谢谢陆老师!
Table[k! StirlingS2[n, k], {n, 11}, {k, n}]
{1}
{1, 2}
{1, 6, 6}
{1, 14, 36, 24}
{1, 30, 150, 240, 120}
{1, 62, 540, 1560, 1800, 720}
{1, 126,1806, 8400, 16800, 15120, 5040}
{1, 254, 5796, 40824,126000, 191520, 141120, 40320}
{1, 510, 18150,186480, 834120, 1905120, 2328480, 1451520, 362880}
{1,1022, 55980, 818520, 5103000, 16435440, 29635200, 30240000, 16329600, 3628800}{1,2046,171006,3498000,29607600,129230640,322494480,479001600,419126400,199584000,39916800}
Table[StirlingS2[n, k], {n, 11}, {k, n}]
{1}
{1, 1}
{1, 3, 1}
{1, 7, 6, 1}
{1, 15, 25, 10, 1}
{1, 31, 90, 65, 15, 1}
{1, 63, 301, 350, 140, 21, 1}
{1, 127, 966, 1701, 1050, 266, 28, 1}
{1, 255, 3025, 7770, 6951, 2646, 462, 36, 1}
{1, 511, 9330, 34105, 42525, 22827, 5880, 750, 45, 1}
{1,1023,28501,145750,246730,179487,63987,11880,1155,55, 1} |