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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 28 |
| 3 | 256 |
| 4 | 2853 |
| 5 | 30283 |
| 6 | 321815 |
| 7 | 3414588 |
| 8 | 36212912 |
| 9 | 383990913 |
| 10 | 4071436782 |
| 11 | 43168209556 |
| 12 | 457694879893 |
| 13 | 4852734814404 |
| 14 | 51451313282657 |
| 15 | 545514314383676 |
| 16 | 5783833141059232 |
| 17 | 61323273361025444 |
| 18 | 650181923557415105 |
[1,28,256,2853,30283,321815,3414588,36212912, 383990913,4071436782,43168209556,457694879893, 4852734814404,51451313282657,545514314383676, 5783833141059232,61323273361025444, 650181923557415105] |