n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 12 |
4 | 34 |
5 | 102 |
6 | 374 |
7 | 1680 |
8 | 10271 |
9 | 91878 |
10 | 1308856 |
11 | 31048616 |
12 | 1243411976 |
13 | 83446254312 |
14 | 9312844044030 |
15 | 1715236203607456 |
[1,2,5,12,34,102,374,1680,10271,91878,1308856, 31048616,1243411976,83446254312,9312844044030, 1715236203607456] |