a(1) = 1, for n>=2, a(n) = B(2*n-1, n), where B(n, x) is the Bernoulli polynomial.

A292830

a(1) = 1, for n>=2, a(n) = B(2*n-1, n), where B(n, x) is the Bernoulli polynomial.

Terms

    a(0) =1a(1) =3a(2) =85a(3) =5558a(4) =651186a(5) =119617025a(6) =31697064295

External references