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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 16 |
| 2 | 17 |
| 3 | 50 |
| 4 | 267 |
| 5 | 1118 |
| 6 | 2503 |
| 7 | 3621 |
| 8 | 9745 |
| 9 | 23111 |
| 10 | 79078 |
| 11 | 102189 |
| 12 | 385645 |
| 13 | 4729929 |
| 14 | 14575432 |
| 15 | 19305361 |
| 16 | 72491515 |
| 17 | 164288391 |
| 18 | 401068297 |
| 19 | 565356688 |
| 20 | 1531781673 |
| 21 | 6692483380 |
| 22 | 34994198573 |
| 23 | 76680880526 |
| 24 | 111675079099 |
| 25 | 1863482146110 |
| 26 | 93285782384599 |
| 27 | 1494436000299694 |
[1,16,17,50,267,1118,2503,3621,9745,23111,79078, 102189,385645,4729929,14575432,19305361,72491515, 164288391,401068297,565356688,1531781673, 6692483380,34994198573,76680880526,111675079099, 1863482146110,93285782384599,1494436000299694] |