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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 6 |
| 4 | 6 |
| 5 | 26 |
| 6 | 36 |
| 7 | 28 |
| 8 | 186 |
| 9 | 265 |
| 10 | 738 |
| 11 | 1105 |
| 12 | 3186 |
| 13 | 5269 |
| 14 | 15516 |
| 15 | 29728 |
| 16 | 55761 |
| 17 | 35228 |
| 18 | 235278 |
| 19 | 441475 |
| 20 | 272526 |
| 21 | 1861166 |
| 22 | 3478866 |
| 23 | 6231073 |
| 24 | 1899171 |
| 25 | 5672262 |
| 26 | 50533341 |
| 27 | 17325482 |
| 28 | 186108951 |
| 29 | 21328109 |
| 30 | 63792576 |
| 31 | 1264831925 |
| 32 | 3794064336 |
| 33 | 7086578554 |
[2,3,6,6,26,36,28,186,265,738,1105,3186,5269, 15516,29728,55761,35228,235278,441475,272526, 1861166,3478866,6231073,1899171,5672262,50533341, 17325482,186108951,21328109,63792576,1264831925, 3794064336,7086578554] |