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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 6 |
| 3 | 11 |
| 4 | 50 |
| 5 | 137 |
| 6 | 147 |
| 7 | 363 |
| 8 | 1522 |
| 9 | 7129 |
| 10 | 7381 |
| 11 | 83711 |
| 12 | 86021 |
| 13 | 1145993 |
| 14 | 1171733 |
| 15 | 1195757 |
| 16 | 4873118 |
| 17 | 42142223 |
| 18 | 42822903 |
| 19 | 275295799 |
| 20 | 279175675 |
| 21 | 56574159 |
| 22 | 19093197 |
| 23 | 444316699 |
| 24 | 1347822955 |
| 25 | 34052522467 |
| 26 | 34395742267 |
| 27 | 312536252003 |
| 28 | 315404588903 |
| 29 | 9227046511387 |
[2,6,11,50,137,147,363,1522,7129,7381,83711,86021, 1145993,1171733,1195757,4873118,42142223,42822903, 275295799,279175675,56574159,19093197,444316699, 1347822955,34052522467,34395742267,312536252003, 315404588903,9227046511387] |