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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 56 |
| 3 | 1925 |
| 4 | 2181 |
| 5 | 2465 |
| 6 | 13056 |
| 7 | 14540 |
| 8 | 16188 |
| 9 | 77865 |
| 10 | 86513 |
| 11 | 96117 |
| 12 | 455588 |
| 13 | 505992 |
| 14 | 561968 |
| 15 | 2657117 |
| 16 | 2950893 |
| 17 | 3277145 |
| 18 | 15488568 |
| 19 | 17200820 |
| 20 | 19102356 |
| 21 | 90275745 |
| 22 | 100255481 |
| 23 | 111338445 |
| 24 | 526167356 |
| 25 | 584333520 |
| 26 | 648929768 |
| 27 | 3066729845 |
[0,56,1925,2181,2465,13056,14540,16188,77865, 86513,96117,455588,505992,561968,2657117,2950893, 3277145,15488568,17200820,19102356,90275745, 100255481,111338445,526167356,584333520,648929768, 3066729845] |