Column 2 of triangle A132690.

A132693

Column 2 of triangle A132690.

Terms

    a(0) =1a(1) =1a(2) =-3a(3) =22a(4) =-250a(5) =3810a(6) =-72492a(7) =1649634a(8) =-43626510a(9) =1313526375a(10) =-44332221175

External references