G.f. A(x) satisfies: Sum_{n>=0} A(x)^(n*(n+1)/2) * x^n = Sum_{n>=0} A(x)^((n+1)^2) * x^(2*n).
A335625
G.f. A(x) satisfies: Sum_{n>=0} A(x)^(n*(n+1)/2) * x^n = Sum_{n>=0} A(x)^((n+1)^2) * x^(2*n).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =16a(6) =75a(7) =332a(8) =1509a(9) =7134a(10) =34733a(11) =173318a(12) =885600a(13) =4628518a(14) =24712222a(15) =134684721a(16) =749048314a(17) =4250280931a(18) =24605542944a(19) =145345793814a(20) =876215822887
External references
- oeis: A335625