G.f.: A(x) = 1 + x*A(x)*A(-x) + x^2*exp( Sum_{n>=1} 2*L(n)^2*x^(2*n)/n ), where A(x) = exp(Sum_{n>=1} L(n)*x^n/n).
A205566
G.f.: A(x) = 1 + x*A(x)*A(-x) + x^2*exp( Sum_{n>=1} 2*L(n)^2*x^(2*n)/n ), where A(x) = exp(Sum_{n>=1} L(n)*x^n/n).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =3a(7) =3a(8) =4a(9) =6a(10) =17a(11) =27a(12) =44a(13) =63a(14) =71a(15) =97a(16) =98a(17) =114a(18) =203a(19) =288a(20) =498a(21) =773a(22) =3138a(23) =5863a(24) =8018a(25) =10406a(26) =19726a(27) =32753a(28) =40372a(29) =47679
External references
- oeis: A205566