A294192-OEIS公司

A294192号作为一个简单的表

n个	a（n）
0	1
1	1
2	28
三	1881
4	241696
5	50903725
6	15950981376
7	6965675824177
8	4044321664205824
9	3013398202413705561
10	2802908316869098624000
11	3183461016834811739809321
12	4335741846110695855971852288
13	6974958097518147761490109983781

[1,1,28,1881,241696,50903725,15950981376,6965675824177,4044321664205824,3013398202413705561,2802908316869098624000,3183461016834811739809321,4335741846110695855971852288,6974958097518147761490109983781]