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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 11 |
| 4 | 93 |
| 5 | 1294 |
| 6 | 26045 |
| 7 | 714391 |
| 8 | 26109426 |
| 9 | 1224739755 |
| 10 | 71807248783 |
| 11 | 5173027197636 |
| 12 | 450173748220033 |
| 13 | 46617339568635115 |
| 14 | 5677430539873463470 |
| 15 | 804907754967314483801 |
| 16 | 131598260940217897338131 |
| 17 | 24609634809861999705338820 |
| 18 | 5226508081059269450476666513 |
[1,1,2,11,93,1294,26045,714391,26109426, 1224739755,71807248783,5173027197636, 450173748220033,46617339568635115, 5677430539873463470,804907754967314483801, 131598260940217897338131, 24609634809861999705338820, 5226508081059269450476666513] |