%I A005589 M2277
%S A005589 4,3,3,5,4,4,3,5,5,4,3,6,6,8,8,7,7,9,8,8,6,9,9,11,10,10,9,11,11,10,
%T A005589 6,9,9,11,10,10,9,11,11,10,5,8,8,10,9,9,8,10,10,9,5,8,8,10,9,9,8,10,
%U A005589 10,9,5,8,8,10,9,9,8,10,10,9,7,10,10,12,11,11,10,12,12,11,6,9,9,11
%N A005589 Number of letters in the English name of n, excluding spaces and hyphens.
%C A005589 Diane Karloff observes that repeatedly applying the map k->A005589(k) 
               to any starting value n always leads to 4 (cf. A016037, A133418). 
               - Nov 27, 2007
%D A005589 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A005589 Problems Drive, Eureka, 37 (1974), 8-11 and 33.
%H A005589 Landon Curt Noll, <a href="http://www.isthe.com/chongo/tech/math/number/
               number.html">The English Name of a Number</a>.
%H A005589 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               Number.html">Number</a>
%H A005589 Robert G. Wilson v, <a href="a000027.txt">English names for the numbers 
               from 0 to 11159 without spaces or hyphens </a>.
%H A005589 <a href="Sindx_Lc.html#letters">Index entries for sequences related to 
               number of letters in n</a>
%e A005589 Note that A052360(373373) = 64 whereas a(373373) = 56.
%t A005589 t={"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", 
               "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", 
               "sixteen", "seventeen", "eighteen", "nineteen", "twenty", "twentyone", 
               "twentytwo", "twentythree", "twentyfour", "twentyfive", "twentysix", 
               "twentyseven", "twentyeight", "twentynine", "thirty",\
%t A005589 "thirtyone", "thirtytwo", "thirtythree", "thirtyfour", "thirtyfive", 
               "thirtysix", "thirtyseven", "thirtyeight", "thirtynine", "forty", 
               "fortyone", "fortytwo", "fortythree", "fortyfour", "fortyfive", "fortysix", 
               "fortyseven", "fortyeight", "fortynine", "fifty", "fiftyone", "fiftytwo", 
               "fiftythree", "fiftyfour", "fiftyfive", "fiftysix", "fiftyseven", 
               "fiftyeight", "fiftynine", "sixty", \
%t A005589 "sixtyone", "sixtytwo", "sixtythree", "sixtyfour", "sixtyfive", "sixtysix", 
               "sixtyseven", "sixtyeight", "sixtynine", "seventy", "seventyone", 
               "seventytwo", "seventythree", "seventyfour", "seventyfive", "seventysix", 
               "seventyseven", "seventyeight", "seventynine", "eighty", "eightyone", 
               "eightytwo", "eightythree", "eightyfour", "eightyfive", "eightysix", 
               "eightyseven", "eightyeight", "eightynine", "ninety", \
%t A005589 "ninetyone", "ninetytwo", "ninetythree", "ninetyfour", "ninetyfive", 
               "ninetysix", "ninetyseven", "ninetyeight", "ninetynine", "onehundred"}
%t A005589 Table[ StringLength@ t[[n]], {n, 100}] (* Robert G. Wilson v (rgwv(AT)rgwv.com), 
               Nov 04 2007 *)
%Y A005589 Cf. A006944 (ordinals), A052360, A052362-A052363, A134629, A133418, A016037.
%Y A005589 Sequence in context: A048853 A011762 A063571 this_sequence A052360 A154913 
               A154915
%Y A005589 Adjacent sequences: A005586 A005587 A005588 this_sequence A005590 A005591 
               A005592
%K A005589 nonn,word,nice,easy
%O A005589 0,1
%A A005589 N. J. A. Sloane (njas(AT)research.att.com).
%E A005589 Corrected and extended by Larry Reeves (larryr(AT)acm.org) and Allan 
               Wechsler (acw(AT)alum.mit.edu), Mar 20 2000
%E A005589 Erroneous b-file deleted by N. J. A. Sloane (njas(AT)research.att.com), 
               Sep 25 2008