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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 13 |
| 4 | 27 |
| 5 | 52 |
| 6 | 110 |
| 7 | 211 |
| 8 | 444 |
| 9 | 842 |
| 10 | 1791 |
| 11 | 3374 |
| 12 | 7153 |
| 13 | 13451 |
| 14 | 28638 |
| 15 | 53921 |
| 16 | 114675 |
| 17 | 215182 |
| 18 | 458201 |
| 19 | 862887 |
| 20 | 1835000 |
| 21 | 3442916 |
| 22 | 7331102 |
| 23 | 13806497 |
| 24 | 29359219 |
| 25 | 55086734 |
| 26 | 117298129 |
| 27 | 220904507 |
| 28 | 469746294 |
| 29 | 881387465 |
| 30 | 1876768959 |
| 31 | 3534472646 |
| 32 | 7515942633 |
[1,3,6,13,27,52,110,211,444,842,1791,3374,7153, 13451,28638,53921,114675,215182,458201,862887, 1835000,3442916,7331102,13806497,29359219, 55086734,117298129,220904507,469746294,881387465, 1876768959,3534472646,7515942633] |