A(x;t)=1+x+(4+2*t)*x^2+(27+22*t)*x^3+(248+264*t+30*t^2)*x*4+
三角形开始:
n\k[0][1][2][3][4][5]
[0] 1;
[1] 1;
[2] 4, 2;
[3] 27, 22;
[4] 248, 264, 30;
[5] 2830, 3610, 830, 8;
[6] 38232, 55768, 18746, 1078;
[7] 593859, 961740, 414720, 46986, 576;
[8] 10401712, 18326976, 9457788, 1593664, 62682, 112;
[9] 202601898, 382706674, 226526362, 49941310, 3569882, 45296;
[10] ...