Search: id:A061193
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%I A061193
%S A061193 1,2,3,4,8,10,12,19,37,54,65,77,314,366,770,1327,1373,1937,2561,2663,
%T A061193 5834,5985,6751,12003,13066,13973,26790,51924,66530,79502,130100,455663,
%U A061193 517430,757263,841842,1791864,1819050,4197919
%N A061193 Number of digits in n-th even perfect number (A000396).
%C A061193 The next known value is 8107892 but this may not be the next one.
%D A061193 Martin Gardner, Mathematical Magic Show. Alfred A. Knopf. 1977 p. 165
%D A061193 Paul Hoffman, Archimedes' Revenge. Penguin. 1988 p. 11
%D A061193 Donald D. Spencer, Key Dates in Number Theory History. Camelot Pub.Co. 
               1995 p. 80.
%H A061193 A. Byerley, <a href="http://www.andrews.edu/~byerley/perfect.html">Relationship 
               Between Mersenne Primes and Perfect Numbers</a>
%H A061193 C. K. Caldwell, <a href="http://www.utm.edu/research/primes/mersenne/
               index.html#known">Table of Known Mersenne Primes</a>
%H A061193 C. K. Caldwell, <a href="http://www.utm.edu/research/primes/mersenne/
               index.html#known">Table of Known Mersenne Primes</a>.
%H A061193 J. O. M. Pedersen, <a href="http://amicable.homepage.dk/tables.htm">Tables 
               of Aliquot Cycles</a>
%H A061193 H. J. Smith, <a href="http://harry-j-smith.com/hjsmithh/Perfect/Mersenne.html">
               Mersenne Primes</a>
%Y A061193 Cf. A000396.
%Y A061193 Sequence in context: A073465 A161494 A121612 this_sequence A135772 A051783 
               A033083
%Y A061193 Adjacent sequences: A061190 A061191 A061192 this_sequence A061194 A061195 
               A061196
%K A061193 nonn,base
%O A061193 1,2
%A A061193 Lekraj Beedassy (blekraj(AT)yahoo.com), May 30 2001
%E A061193 More terms from Harry J. Smith (hjsmithh(AT)sbcglobal.net), Apr 16 2003

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