a(0) = 0, a(1) = 1; for n > 1, a(n+1) = (2*n + 1)*a(n) + n^4*a(n-1).
A142999
a(0) = 0, a(1) = 1; for n > 1, a(n+1) = (2*n + 1)*a(n) + n^4*a(n-1).
Terms
- a(0) =0a(1) =1a(2) =3a(3) =31a(4) =460a(5) =12076a(6) =420336a(7) =21114864a(8) =1325949696a(9) =109027627776
External references
- oeis: A142999