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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 10 |
| 3 | 38 |
| 4 | 155 |
| 5 | 655 |
| 6 | 2849 |
| 7 | 12669 |
| 8 | 57209 |
| 9 | 261589 |
| 10 | 1208492 |
| 11 | 5628460 |
| 12 | 26393977 |
| 13 | 124495365 |
| 14 | 590093208 |
| 15 | 2808834386 |
| 16 | 13419588807 |
| 17 | 64319800651 |
| 18 | 309159921846 |
| 19 | 1489772727522 |
| 20 | 7194990913263 |
| 21 | 34818968871025 |
| 22 | 168807738275493 |
| 23 | 819749583094019 |
| 24 | 3986745249725499 |
| 25 | 19415473533566595 |
| 26 | 94671145392024186 |
[1,3,10,38,155,655,2849,12669,57209,261589, 1208492,5628460,26393977,124495365,590093208, 2808834386,13419588807,64319800651,309159921846, 1489772727522,7194990913263,34818968871025, 168807738275493,819749583094019,3986745249725499, 19415473533566595,94671145392024186] |