n | a(n) |
---|---|
4 | 0 |
5 | 0 |
6 | 24 |
7 | 154 |
8 | 1664 |
9 | 15984 |
10 | 173000 |
11 | 2004486 |
12 | 25086336 |
13 | 337215372 |
14 | 4852472744 |
15 | 74473953570 |
16 | 1214929163904 |
17 | 21000334935308 |
18 | 383498204201496 |
19 | 7379028867234934 |
20 | 149233618755354240 |
21 | 3165087929247599208 |
22 | 70251457394397108280 |
[0,0,24,154,1664,15984,173000,2004486,25086336, 337215372,4852472744,74473953570,1214929163904, 21000334935308,383498204201496,7379028867234934, 149233618755354240,3165087929247599208, 70251457394397108280] |