a(n) = A061300(n+1)/A061300(n).

Terms

a(0) =1a(1) =2a(2) =6a(3) =30a(4) =154a(5) =1105a(6) =4788a(7) =20677a(8) =216931a(9) =858925a(10) =7105392a(11) =5546059a(12) =2018025900a(13) =1480452337a(14) =3238556831a(15) =107972737a(17) =4683032671a(19) =160436746661