a(n) = coefficient of x^n in A(x) = Sum_{n>=0} x^n*F(x)^n * (1 - x^n*F(x)^n)^n, where F(x) = 1 + x*F(x)^3 is a g.f. of A001764.
A357793
a(n) = coefficient of x^n in A(x) = Sum_{n>=0} x^n*F(x)^n * (1 - x^n*F(x)^n)^n, where F(x) = 1 + x*F(x)^3 is a g.f. of A001764.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =4a(4) =14a(5) =64a(6) =314a(7) =1633a(8) =8826a(9) =49107a(10) =279349a(11) =1617290a(12) =9498099a(13) =56445918a(14) =338817460a(15) =2051182532a(16) =12509647159a(17) =76785827812a(18) =474000090118
External references
- oeis: A357793