G.f.: Sum_{n>=0} x^n * Sum_{k=0..n} binomial(n,k)^4 * x^k*(1-x)^(n-k).
A218216
G.f.: Sum_{n>=0} x^n * Sum_{k=0..n} binomial(n,k)^4 * x^k*(1-x)^(n-k).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =15a(4) =65a(5) =175a(6) =1155a(7) =7229a(8) =31081a(9) =162755a(10) =1018195a(11) =5448645a(12) =28879019a(13) =171229541a(14) =991796825a(15) =5540516759a(16) =32232757569a(17) =190448140543
External references
- oeis: A218216