%I A005261 M2156
%S A005261 1,2,34,488,9826,206252,4734304,113245568,2816649826,72001228052,
%T A005261 1883210876284,50168588906768,1357245464138656,37198352117916992,
%U A005261 1030920212982957184,28847760730478655488,814066783370083977826
%N A005261 Sum C(n,k)^5, k = 0 . . n.
%D A005261 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A005261 C. Elsner, On recurrence formulae for sums involving binomial coefficients, 
               Fib. Q., 43 (No. 1, 2005), 31-45.
%H A005261 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               BinomialSums.html">Link to a section of The World of Mathematics.</
               a>
%F A005261 a(n) ~ 4*5^(-1/2)*pi^-2*n^-2*2^(5*n) - Joe Keane (jgk(AT)jgk.org), Jun 
               21 2002
%Y A005261 Sequence in context: A136362 A098531 A092408 this_sequence A104898 A071799 
               A098704
%Y A005261 Adjacent sequences: A005258 A005259 A005260 this_sequence A005262 A005263 
               A005264
%K A005261 nonn
%O A005261 0,2
%A A005261 N. J. A. Sloane (njas(AT)research.att.com).
%E A005261 More terms from Matthew Conroy (list1(AT)madandmoonly.com), Mar 16 2006