Column 0 of triangle A291844.

A294160

Column 0 of triangle A291844.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =29a(4) =274a(5) =3145a(6) =42294a(7) =651227a(8) =11295242a(9) =217954807a(10) =4632600152a(11) =107572674851

External references