Sum of fourth powers of trinomial coefficients: a(n) = Sum_{k=0..2n} trinomial(n,k)^4 where trinomial(n,k) = [x^k] (1 + x + x^2)^n.
A132304
Sum of fourth powers of trinomial coefficients: a(n) = Sum_{k=0..2n} trinomial(n,k)^4 where trinomial(n,k) = [x^k] (1 + x + x^2)^n.
Terms
- a(0) =1a(1) =3a(2) =115a(3) =5157a(4) =281907a(5) =16688953a(6) =1043460469a(7) =67769148555
External references
- oeis: A132304