a(n) = (-1)^n*hypergeom([-n, n - 1/2], [1], 4).
A299864
a(n) = (-1)^n*hypergeom([-n, n - 1/2], [1], 4).
Terms
- a(0) =1a(1) =1a(2) =19a(3) =239a(4) =3011a(5) =38435a(6) =496365a(7) =6470385a(8) =84975315a(9) =1122708899a(10) =14906800361a(11) =198740733581
External references
- oeis: A299864