G.f. A(x) satisfies: 5*x = Sum_{n=-oo..+oo} (-1)^n * x^(n*(n+1)/2) * A(x)^n.
A355355
G.f. A(x) satisfies: 5*x = Sum_{n=-oo..+oo} (-1)^n * x^(n*(n+1)/2) * A(x)^n.
Terms
- a(0) =1a(1) =5a(2) =40a(3) =320a(4) =2660a(5) =23455a(6) =216540a(7) =2064055a(8) =20137945a(9) =200134600a(10) =2019406895a(11) =20635313325a(12) =213109960895
External references
- oeis: A355355