a(2,n) as defined in A003148.

A084543

a(2,n) as defined in A003148.

Terms

    a(0) =3a(1) =-9a(2) =69a(3) =-531a(4) =6147a(5) =-73665a(6) =1143045a(7) =-18456795a(8) =359420355a(9) =-7279744185a(10) =170639259525

External references