Column 0 of triangle A102920, which equals the matrix square of A102098.

A102921

Column 0 of triangle A102920, which equals the matrix square of A102098.

Terms

    a(0) =1a(1) =3a(2) =36a(3) =1036a(4) =56355a(5) =5045370a(6) =679409158a(7) =129195427716

External references