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A322223

Row sums of triangle A322220.

1, 2, 7, 68, 1117, 26022, 852643, 37427720, 2106596217, 148028405834, 12710764939903, 1309245626288204, 159319271183808085, 22612933245438028526, 3702622309608031404187, 692759321578889405126160, 146876961591424085658564081, 35029014636353492196570693778, 9336082505393098752275403472375, 2764539510981894584911330813369940

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OFFSET

0,2

LINKS

Paul D. Hanna, Table of n, a(n) for n = 0..49

PROG

(PARI) {A322220(n, k) = my(Sx=x, Sy=y, Cx=1, Cy=1); for(i=1, 2*n,

Sx = intformal( Cx*Cy +x*O(x^(2*n)), x);

Cx = 1 + intformal( Sx*Cy, x);

Sy = intformal( Cy*Cx +y*O(y^(2*k)), y);

Cy = 1 + intformal( Sy*Cx, y));

(2*n+1-2*k)!*(2*k)! *polcoeff(polcoeff(Sx, 2*n+1-2*k, x), 2*k, y)}