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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 9 |
| 4 | 29 |
| 5 | 299 |
| 6 | 926 |
| 7 | 4003 |
| 8 | 4929 |
| 9 | 8932 |
| 10 | 469393 |
| 11 | 478325 |
| 12 | 947718 |
| 13 | 4269197 |
| 14 | 13755309 |
| 15 | 141822287 |
| 16 | 439222170 |
| 17 | 1898710967 |
| 18 | 2337933137 |
| 19 | 4236644104 |
| 20 | 222643426545 |
| 21 | 226880070649 |
| 22 | 449523497194 |
| 23 | 2024974059425 |
| 24 | 6524445675469 |
| 25 | 67269430814115 |
| 26 | 208332738117814 |
[1,1,2,9,29,299,926,4003,4929,8932,469393,478325, 947718,4269197,13755309,141822287,439222170, 1898710967,2337933137,4236644104,222643426545, 226880070649,449523497194,2024974059425, 6524445675469,67269430814115,208332738117814] |