|
%I #5 Mar 30 2012 18:38:58
%S 1,13,213,6233,277865,17567973,1495207357,164827853233,22846356916689,
%T 3888897476494013,797512055521085861,193931677044463586313,
%U 55175478875457172546873,18157764800352633049290133
%N (-1)^(n+1)/2*sum(k=1,2n,C(2n+1,k)*B(k)*4^k) where C(n,k) are the binomial coefficients, B(k) the Bernoulli numbers.
%o (PARI) for(n=1,25,print1(-(-1)^n*sum(i=1,2*n,binomial(2*n+1,i)*bernfrac(i)*3^i)/2,","))
%K easy,nonn
%O 1,2
%A _Benoit Cloitre_, May 01 2002
|
