Column 0 of triangle A132615.

A132616

Column 0 of triangle A132615.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =6a(4) =80a(5) =1666a(6) =47232a(7) =1694704a(8) =73552752a(9) =3744491970a(10) =218684051648

External references