a(n) = hypergeom([-n, n - 1], [1], -4).
A299845
a(n) = hypergeom([-n, n - 1], [1], -4).
Terms
- a(0) =1a(1) =1a(2) =25a(3) =425a(4) =7025a(5) =116625a(6) =1951625a(7) =32903225a(8) =558265825a(9) =9522632225a(10) =163160773625
External references
- oeis: A299845