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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 58 |
| 3 | 586 |
| 4 | 4404 |
| 5 | 32722 |
| 6 | 259458 |
| 7 | 2046700 |
| 8 | 16005328 |
| 9 | 125458506 |
| 10 | 984034642 |
| 11 | 7715900888 |
| 12 | 60499523096 |
| 13 | 474378832026 |
| 14 | 3719632557790 |
| 15 | 29165838646828 |
| 16 | 228690711059796 |
| 17 | 1793174932294258 |
| 18 | 14060373065557530 |
| 19 | 110248073913792604 |
[1,58,586,4404,32722,259458,2046700,16005328, 125458506,984034642,7715900888,60499523096, 474378832026,3719632557790,29165838646828, 228690711059796,1793174932294258, 14060373065557530,110248073913792604] |