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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 29 |
| 4 | 233 |
| 5 | 2329 |
| 6 | 27949 |
| 7 | 391285 |
| 8 | 6260561 |
| 9 | 112690097 |
| 10 | 2253801941 |
| 11 | 49583642701 |
| 12 | 1190007424825 |
| 13 | 30940193045449 |
| 14 | 866325405272573 |
| 15 | 25989762158177189 |
| 16 | 831672389061670049 |
| 17 | 28276861228096781665 |
| 18 | 1017967004211484139941 |
| 19 | 38682746160036397317757 |
[1,1,5,29,233,2329,27949,391285,6260561,112690097, 2253801941,49583642701,1190007424825, 30940193045449,866325405272573,25989762158177189, 831672389061670049,28276861228096781665, 1017967004211484139941,38682746160036397317757] |