Search: id:A136509
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%I A136509
%S A136509 1,2,6,16,50,171,697,3416,21126,169105,1794683,25891713,507686588,
%T A136509 13878639286,518836271475,27356839451662,1968958300103603,
%U A136509 200935638262212462,27892630019328034846,5502857784211927305980
%N A136509 G.f.: A(x) = Sum_{n>=0} (-1)^n * (1 -x -2^n*x^2)^(-1) * log(1 -x -2^n*x^2)^n 
               / n!.
%o A136509 (PARI) {a(n)=polcoeff(sum(i=0,n,(-1)^i*1/(1-x*(1+2^i*x +x*O(x^n)))*log(1-x-2^i*x^2 
               +x*O(x^n))^i/i!),n)}
%Y A136509 Cf. A136508; A136507.
%Y A136509 Sequence in context: A000136 A013989 A002841 this_sequence A100664 A003446 
               A045696
%Y A136509 Adjacent sequences: A136506 A136507 A136508 this_sequence A136510 A136511 
               A136512
%K A136509 nonn
%O A136509 0,2
%A A136509 Paul D. Hanna (pauldhanna(AT)juno.com), Jan 01 2008

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