G.f. A(x) satisfies: Sum_{k=0..n} [x^k] A(x)^n = binomial(7*n,3*n).
A244654
G.f. A(x) satisfies: Sum_{k=0..n} [x^k] A(x)^n = binomial(7*n,3*n).
Terms
- a(0) =1a(1) =34a(2) =889a(3) =22344a(4) =568750a(5) =14812084a(6) =394432598a(7) =10708188328a(8) =295488284471
External references
- oeis: A244654