%I A006968 M0417
%S A006968 1,2,3,2,1,2,3,4,2,1,2,3,4,3,2,3,4,5,3,2,3,4,5,4,3,4,5,6,4,3,4,5,6,5,
%T A006968 4,5,6,7,5,2,3,4,5,4,3,4,5,6,4,1,2,3,4,3,2,3,4,5,3,2,3,4,5,4,3,4,5,6,
%U A006968 4,3,4,5,6,5,4,5,6,7,5,4,5,6,7,6,5,6,7,8,6,2,3,4,5,4,3,4,5,6,4,1,2,3
%N A006968 Number of letters in Roman numeral representation of n.
%D A006968 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A006968 Netnews group rec.puzzles, Frequently Asked Questions (FAQ) file. (Science 
               Section).
%H A006968 P. Lewis, <a href="http://www.wilkiecollins.demon.co.uk/roman/front.htm">
               ROMAN NUMERALS AND DATES</a>
%H A006968 Rec.puzzles, <a href="http://www.rec-puzzles.org">Archive</a>
%H A006968 Gerard Schildberger, <a href="a006968.txt">The first 3999 numbers in 
               Roman numerals</a>
%H A006968 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               RomanNumeral.html">Link to a section of The World of Mathematics.</
               a>
%H A006968 <a href="Sindx_Lc.html#letters">Index entries for sequences related to 
               number of letters in n</a>
%o A006968 (R) as.roman(1 :1024) [From N. J. A. Sloane, Aug 23 2009]
%Y A006968 Cf. A092196.
%Y A006968 Sequence in context: A098236 A152978 A118121 this_sequence A058207 A105969 
               A163530
%Y A006968 Adjacent sequences: A006965 A006966 A006967 this_sequence A006969 A006970 
               A006971
%K A006968 nonn,base,nice,easy
%O A006968 1,2
%A A006968 N. J. A. Sloane (njas(AT)research.att.com).
%E A006968 More terms from Eric Weisstein (eric(AT)weisstein.com)