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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 23 |
| 3 | 139 |
| 4 | 293 |
| 5 | 1129 |
| 6 | 2477 |
| 7 | 8467 |
| 8 | 30593 |
| 9 | 81463 |
| 10 | 85933 |
| 11 | 190409 |
| 12 | 404597 |
| 13 | 535399 |
| 14 | 840353 |
| 15 | 1100977 |
| 16 | 2127163 |
| 17 | 4640599 |
| 18 | 6613631 |
| 19 | 6958667 |
| 20 | 10343761 |
| 21 | 24120233 |
| 22 | 49269581 |
| 23 | 83751121 |
| 24 | 101649649 |
| 25 | 166726367 |
| 26 | 273469741 |
| 27 | 310845683 |
| 28 | 568951459 |
[3,23,139,293,1129,2477,8467,30593,81463,85933, 190409,404597,535399,840353,1100977,2127163, 4640599,6613631,6958667,10343761,24120233, 49269581,83751121,101649649,166726367,273469741, 310845683,568951459] |