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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 58 |
| 7 | 112 |
| 8 | 218 |
| 9 | 424 |
| 10 | 830 |
| 11 | 1624 |
| 12 | 3182 |
| 13 | 6232 |
| 14 | 12212 |
| 15 | 23924 |
| 16 | 46882 |
| 17 | 91880 |
| 18 | 180128 |
| 19 | 353224 |
| 20 | 692898 |
| 21 | 1359624 |
| 22 | 2668760 |
| 23 | 5239976 |
| 24 | 10291538 |
| 25 | 20218824 |
| 26 | 39733424 |
| 27 | 78104712 |
| 28 | 153574456 |
| 29 | 302050244 |
| 30 | 594233080 |
| 31 | 1169365256 |
| 32 | 2301748798 |
| 33 | 4531879652 |
[1,2,4,8,16,30,58,112,218,424,830,1624,3182,6232, 12212,23924,46882,91880,180128,353224,692898, 1359624,2668760,5239976,10291538,20218824, 39733424,78104712,153574456,302050244,594233080, 1169365256,2301748798,4531879652] |