a(n) = Sum_{k=0..n} binomial(n, k)*hypergeom([k - n, n + 1], [k + 2], -4).
A297705
a(n) = Sum_{k=0..n} binomial(n, k)*hypergeom([k - n, n + 1], [k + 2], -4).
Terms
- a(0) =1a(1) =6a(2) =56a(3) =636a(4) =8036a(5) =108516a(6) =1533316a(7) =22389396a(8) =335177396a(9) =5116746276a(10) =79350018276
External references
- oeis: A297705