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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 22 |
| 6 | 38 |
| 7 | 82 |
| 8 | 194 |
| 9 | 544 |
| 10 | 896 |
| 11 | 1798 |
| 12 | 3626 |
| 13 | 7408 |
| 14 | 15518 |
| 15 | 33766 |
| 16 | 79424 |
| 17 | 222754 |
| 18 | 366086 |
| 19 | 732178 |
| 20 | 1464386 |
| 21 | 2928928 |
| 22 | 5858558 |
| 23 | 11719846 |
| 24 | 23451584 |
| 25 | 46967074 |
| 26 | 94220810 |
| 27 | 189539920 |
| 28 | 383474012 |
| 29 | 784541050 |
| 30 | 1639851326 |
| 31 | 3568955854 |
[1,2,3,8,22,38,82,194,544,896,1798,3626,7408, 15518,33766,79424,222754,366086,732178,1464386, 2928928,5858558,11719846,23451584,46967074, 94220810,189539920,383474012,784541050,1639851326, 3568955854] |