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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 145 |
| 3 | 2590 |
| 4 | 53935 |
| 5 | 1270798 |
| 6 | 33213955 |
| 7 | 949441810 |
| 8 | 29371429345 |
| 9 | 975236890330 |
| 10 | 34526021240809 |
| 11 | 1296190060488190 |
| 12 | 51368290426260655 |
| 13 | 2140624557899891710 |
| 14 | 93487359214816335115 |
| 15 | 4266459267720049656562 |
[1,10,145,2590,53935,1270798,33213955,949441810, 29371429345,975236890330,34526021240809, 1296190060488190,51368290426260655, 2140624557899891710,93487359214816335115, 4266459267720049656562] |