a(n) = hypergeom([-n, n - 1/2], [1], -4).
A299506
a(n) = hypergeom([-n, n - 1/2], [1], -4).
Terms
- a(0) =1a(1) =3a(2) =43a(3) =661a(4) =10515a(5) =171097a(6) =2828101a(7) =47284251a(8) =797456947a(9) =13540982665a(10) =231188344401
External references
- oeis: A299506