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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 14 |
| 4 | 43 |
| 5 | 151 |
| 6 | 597 |
| 7 | 2701 |
| 8 | 13795 |
| 9 | 79129 |
| 10 | 503693 |
| 11 | 3527292 |
| 12 | 26945081 |
| 13 | 222997659 |
| 14 | 1987492223 |
| 15 | 18979143358 |
| 16 | 193319844179 |
| 17 | 2092211006561 |
| 18 | 23974970862885 |
| 19 | 289995870991594 |
| 20 | 3692342091149853 |
| 21 | 49362977658760079 |
| 22 | 691359846917532235 |
| 23 | 10123067013673200297 |
| 24 | 154669070822937580645 |
[1,2,5,14,43,151,597,2701,13795,79129,503693, 3527292,26945081,222997659,1987492223,18979143358, 193319844179,2092211006561,23974970862885, 289995870991594,3692342091149853, 49362977658760079,691359846917532235, 10123067013673200297,154669070822937580645] |