n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 18 |
5 | 100 |
6 | 705 |
7 | 5166 |
8 | 44856 |
9 | 413316 |
10 | 4297635 |
11 | 47906650 |
12 | 586050828 |
13 | 7669704978 |
14 | 108433645502 |
15 | 1632017808435 |
16 | 26240224612920 |
17 | 446861879976600 |
18 | 8063224431751719 |
19 | 153335328111105282 |
20 | 3070484092409318100 |
21 | 64508501542986638550 |
22 | 1420061287311444508962 |
[0,0,1,3,18,100,705,5166,44856,413316,4297635, 47906650,586050828,7669704978,108433645502, 1632017808435,26240224612920,446861879976600, 8063224431751719,153335328111105282, 3070484092409318100,64508501542986638550, 1420061287311444508962] |