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| n | a(n) |
|---|---|
| 1 | 228 |
| 2 | 1504 |
| 3 | 8818 |
| 4 | 45174 |
| 5 | 231794 |
| 6 | 1175574 |
| 7 | 5973996 |
| 8 | 30040618 |
| 9 | 152059128 |
| 10 | 756272532 |
| 11 | 3780011054 |
| 12 | 18903094466 |
| 13 | 94583752654 |
| 14 | 472578275050 |
| 15 | 2362223640926 |
| 16 | 11809789092100 |
| 17 | 59059704911636 |
| 18 | 295279046414212 |
| 19 | 1476177725665244 |
[228,1504,8818,45174,231794,1175574,5973996, 30040618,152059128,756272532,3780011054, 18903094466,94583752654,472578275050, 2362223640926,11809789092100,59059704911636, 295279046414212,1476177725665244] |