Column 2 of triangle A055300.

Terms

a(0) =1a(1) =-1a(2) =0a(3) =1a(4) =0a(5) =-3a(6) =-1a(7) =14a(8) =20a(9) =-77a(10) =-308a(11) =147a(12) =3965a(13) =12527a(14) =-26255a(15) =-446923a(16) =-1127033a(17) =9020388a(18) =71170748a(19) =57286010a(20) =-2168151928a(21) =-17700260071a(22) =-11899834419a(23) =993097077555