G.f.: A(x) = Sum_{n>=1} a(n)*x^n = x*Product_{n>=1} (1 + a(n)*x^n)/(1 - a(n)*x^n).
A299021
G.f.: A(x) = Sum_{n>=1} a(n)*x^n = x*Product_{n>=1} (1 + a(n)*x^n)/(1 - a(n)*x^n).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =86a(5) =358a(6) =1558a(7) =6966a(8) =31894a(9) =148918a(10) =705062a(11) =3380054a(12) =16381158a(13) =80056550a(14) =394266950a(15) =1955139942a(16) =9749771926a(17) =48873487942a(18) =246160229782
External references
- oeis: A299021