a(n) = Sum_{k=0..n} binomial(n,k)^4 * 2^k.
A216696
a(n) = Sum_{k=0..n} binomial(n,k)^4 * 2^k.
Terms
- a(0) =1a(1) =3a(2) =37a(3) =495a(4) =7761a(5) =131283a(6) =2336629a(7) =43174911a(8) =819869185a(9) =15906350403a(10) =313905320037
External references
- oeis: A216696