a(n) = [x^n] G(x)^(n+1) / (n+1)^2 for n >= 0, where G(x) is the g.f. of A323693.
A323694
a(n) = [x^n] G(x)^(n+1) / (n+1)^2 for n >= 0, where G(x) is the g.f. of A323693.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =80a(4) =1780a(5) =58212a(6) =2609824a(7) =153429696a(8) =11457990000
External references
- oeis: A323694