G.f. A(x) satisfies A(A(x)) = Sum_{k>=1} k^2 * 2^(k-1) * x^k.
A372493
G.f. A(x) satisfies A(A(x)) = Sum_{k>=1} k^2 * 2^(k-1) * x^k.
Terms
- a(0) =0a(1) =1a(2) =4a(3) =2a(4) =12a(5) =-30a(6) =24a(7) =1412a(8) =-18716a(9) =127750a(10) =-19448a(11) =-10721556a(12) =98983992a(13) =546122580a(14) =-19718580272a(15) =30721006440
External references
- oeis: A372493