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| n | a(n) |
|---|---|
| 1 | 22 |
| 2 | 140 |
| 3 | 707 |
| 4 | 21362 |
| 5 | 4991 |
| 6 | 1306066 |
| 7 | 137965 |
| 8 | 2294636 |
| 9 | 31768298 |
| 10 | 1557652 |
| 11 | 340064590 |
| 12 | 38439662 |
| 13 | 105080665 |
| 14 | 273502688 |
| 15 | 543164542 |
| 16 | 9575480365630 |
| 17 | 391890109484 |
| 18 | 14629598023 |
| 19 | 80849485336 |
| 20 | 1241646894380 |
[22,140,707,21362,4991,1306066,137965,2294636, 31768298,1557652,340064590,38439662,105080665, 273502688,543164542,9575480365630,391890109484, 14629598023,80849485336,1241646894380] |