n | a(n) |
---|---|
2 | 2 |
3 | 18 |
4 | 136 |
5 | 1030 |
6 | 7992 |
7 | 63796 |
8 | 522474 |
9 | 4369840 |
10 | 37179840 |
11 | 320861342 |
12 | 2802304988 |
13 | 24725041598 |
14 | 220077128644 |
15 | 1973963065574 |
[2,18,136,1030,7992,63796,522474,4369840,37179840, 320861342,2802304988,24725041598,220077128644, 1973963065574] |