n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 15 |
5 | 302 |
6 | 12559 |
7 | 900288 |
8 | 98986140 |
9 | 15459635718 |
10 | 3251842717671 |
11 | 885987204390450 |
12 | 303482789415233775 |
13 | 127643176985672421000 |
14 | 64668997044706349592900 |
15 | 38844990446097247188562800 |
16 | 27296481783843922533011100000 |
17 | 22184577644604207037479874293750 |
[0,1,2,15,302,12559,900288,98986140,15459635718, 3251842717671,885987204390450,303482789415233775, 127643176985672421000,64668997044706349592900, 38844990446097247188562800, 27296481783843922533011100000, 22184577644604207037479874293750] |