n | a(n) |
---|---|
2 | 2 |
3 | 4 |
4 | 26 |
5 | 134 |
6 | 958 |
7 | 6034 |
8 | 37650 |
9 | 242504 |
10 | 1590952 |
11 | 10574462 |
12 | 71449792 |
13 | 489478402 |
14 | 3388172486 |
15 | 23660827272 |
16 | 166485808342 |
[2,4,26,134,958,6034,37650,242504,1590952, 10574462,71449792,489478402,3388172486, 23660827272,166485808342] |