G.f. satisfies 1 = Sum_{n>=0} ((1+x)^(n*(n-1)/2) / A(x)^n) * (2^n/3^(n+1)).
A325287
G.f. satisfies 1 = Sum_{n>=0} ((1+x)^(n*(n-1)/2) / A(x)^n) * (2^n/3^(n+1)).
Terms
- a(0) =1a(1) =2a(2) =16a(3) =380a(4) =15280a(5) =842672a(6) =57985144a(7) =4735508672a(8) =445364211760
External references
- oeis: A325287