764206503domain: NAppears in sequencesSum of fifth powers of trinomial coefficients: a(n) = Sum_{k=0..2n} trinomial(n,k)^5 where trinomial(n,k) = [x^k] (1 + x + x^2)^n.at n=5A132305a(n) = sum of the n-th power of the trinomial coefficients in row n of triangle A027907.at n=5A168591