A(x;t)=1+x+(6+3*t)*x^2+(50+45*t+5*t^2)*x*3+。..
三角形开始:
n\k[0][1][2][3][4][5][6][7]
[0] 1;
[1] 1;
[2] 6, 3;
[3] 50, 45, 5;
[4] 518, 637, 161, 7;
[5] 6354, 9567, 3744, 414, 9;
[6] 89782, 156123, 80784, 14850, 880, 11;
[7] 1435330, 2781389, 1749969, 446706, 46150, 1651, 13;
[8] 25625910, 54043365, 39305685, 12641265, 1877925, 121275, 2835, 15;
[9] ...