Column 1 of A341723.

Terms

a(0) =1a(1) =-2a(2) =15a(3) =-124a(4) =1285a(5) =-16026a(6) =233135a(7) =-3875768a(8) =72487593a(9) =-1506355510a(10) =34433714755a(11) =-858675022932