a(n) = Sum_{k=0..n} binomial(n,k)^4/(n+1).
A178824
a(n) = Sum_{k=0..n} binomial(n,k)^4/(n+1).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =41a(4) =362a(5) =3542a(6) =37692a(7) =424377a(8) =4990722a(9) =60704138a(10) =758665388a(11) =9694652838a(12) =126203947828
External references
- oeis: A178824