A(x;t)=x+(2*t+2)*x^2+(7*t^2+11*t+6)*x^3+(30*t^3+65*t^2+59*t+22)*x*4+。。。
三角形起点:
n\k[1][2][3][4][5][6][7][8]
[1] 1;
[2] 2, 2;
[3] 7, 11, 6;
[4] 30, 65, 59, 22;
[5] 143, 397, 492, 318, 90;
[6] 728, 2471, 3857, 3430, 1728, 394;
[7] 3876, 15572, 29255, 32728, 22886, 9461, 1806;
[8] 21318, 99009, 217323, 291456, 257001, 148626, 52133, 8558;
[9] ...