Sequence is {a(1,n)}, where a(m,n) is defined at sequence A111518.

Terms

a(0) =1a(1) =1a(2) =-2a(3) =-6a(4) =1a(5) =12a(6) =-50a(7) =-64a(8) =517a(9) =-718a(10) =-4893a(11) =27627a(12) =-20732a(13) =-464357a(14) =2672305a(15) =-2162339a(16) =-62481580a(17) =444310916a(18) =-765988257a(19) =-11093444366a(20) =111888950896a(21) =-384937404033