Expansion of g.f. A(x) = Sum_{n>=0} d^n/dx^n x^(2*n) * (1 + x)^(4*n) / n!.
A361304
Expansion of g.f. A(x) = Sum_{n>=0} d^n/dx^n x^(2*n) * (1 + x)^(4*n) / n!.
Terms
- a(0) =1a(1) =2a(2) =18a(3) =124a(4) =930a(5) =7146a(6) =55804a(7) =441312a(8) =3521898a(9) =28307510a(10) =228820086a(11) =1858240956a(12) =15149110912a(13) =123905220292
External references
- oeis: A361304