a(n) = Sum_{k=0..n} n^(n-k) * binomial(k+n,k).
A368510
a(n) = Sum_{k=0..n} n^(n-k) * binomial(k+n,k).
Terms
- a(0) =1a(1) =3a(2) =16a(3) =113a(4) =1026a(5) =11782a(6) =166776a(7) =2825349a(8) =55797790a(9) =1258065866a(10) =31866312336a(11) =895430095738
External references
- oeis: A368510