n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 72 |
3 | 1292 |
4 | 23184 |
5 | 416020 |
6 | 7465176 |
7 | 133957148 |
8 | 2403763488 |
9 | 43133785636 |
10 | 774004377960 |
11 | 13888945017644 |
12 | 249227005939632 |
13 | 4472197161895732 |
14 | 80250321908183544 |
15 | 1440033597185408060 |
16 | 25840354427429161536 |
[0,4,72,1292,23184,416020,7465176,133957148, 2403763488,43133785636,774004377960, 13888945017644,249227005939632,4472197161895732, 80250321908183544,1440033597185408060, 25840354427429161536] |