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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 8 |
| 5 | 19 |
| 6 | 42 |
| 7 | 92 |
| 8 | 194 |
| 9 | 398 |
| 10 | 808 |
| 11 | 1638 |
| 12 | 3334 |
| 13 | 6686 |
| 14 | 13392 |
| 15 | 26842 |
| 16 | 53708 |
| 17 | 107450 |
| 18 | 214952 |
| 19 | 430148 |
| 20 | 860340 |
| 21 | 1720826 |
| 22 | 3441688 |
| 23 | 6883446 |
| 24 | 13766950 |
| 25 | 27533998 |
| 26 | 55068040 |
| 27 | 110136196 |
| 28 | 220272460 |
| 29 | 440545040 |
| 30 | 881090532 |
| 31 | 1762181454 |
| 32 | 3524362990 |
[1,1,3,8,19,42,92,194,398,808,1638,3334,6686, 13392,26842,53708,107450,214952,430148,860340, 1720826,3441688,6883446,13766950,27533998, 55068040,110136196,220272460,440545040,881090532, 1762181454,3524362990] |