Numerator of Cotesian number C(n,1).

Terms

a(0) =1a(1) =2a(2) =3a(3) =16a(4) =25a(5) =9a(6) =3577a(7) =2944a(8) =15741a(9) =26575a(10) =4495513a(11) =12504a(12) =56280729661a(13) =44436679a(14) =29505985a(15) =63813303296a(17) =6162434073a(19) =167791152125