n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 11 |
4 | 40 |
5 | 177 |
6 | 934 |
7 | 5889 |
8 | 42648 |
9 | 354825 |
10 | 3295194 |
11 | 34194349 |
12 | 387494364 |
13 | 4812801541 |
14 | 64310993478 |
15 | 929134537249 |
16 | 14291172086544 |
17 | 235303563551473 |
18 | 4092687247885554 |
19 | 75620298761841685 |
20 | 1467156197049970084 |
[1,2,4,11,40,177,934,5889,42648,354825,3295194, 34194349,387494364,4812801541,64310993478, 929134537249,14291172086544,235303563551473, 4092687247885554,75620298761841685, 1467156197049970084] |