a(n) = Bernoulli(n, 1)*Pochhammer(n+1, n).

Terms

a(0) =1a(1) =1a(2) =2a(3) =0a(4) =-56a(5) =0a(6) =15840a(7) =0a(8) =-17297280a(9) =0a(10) =50791104000a(11) =0a(13) =0a(15) =0a(17) =0a(19) =0a(21) =0a(23) =0