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| n | a(n) |
|---|---|
| 1 | 577 |
| 2 | 17981 |
| 3 | 182349 |
| 4 | 1042167 |
| 5 | 4211559 |
| 6 | 13497523 |
| 7 | 36644243 |
| 8 | 87831605 |
| 9 | 191065045 |
| 10 | 384593857 |
| 11 | 726495089 |
| 12 | 1301560155 |
| 13 | 2229621291 |
| 14 | 3675454983 |
| 15 | 5860399495 |
| 16 | 9075823625 |
| 17 | 13698583817 |
| 18 | 20208606757 |
| 19 | 29208734581 |
| 20 | 41446969823 |
| 21 | 57841257231 |
[577,17981,182349,1042167,4211559,13497523, 36644243,87831605,191065045,384593857,726495089, 1301560155,2229621291,3675454983,5860399495, 9075823625,13698583817,20208606757,29208734581, 41446969823,57841257231] |