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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 16 |
| 6 | 32 |
| 7 | 64 |
| 8 | 129 |
| 9 | 265 |
| 10 | 558 |
| 11 | 1200 |
| 12 | 2613 |
| 13 | 5721 |
| 14 | 12564 |
| 15 | 27702 |
| 16 | 61419 |
| 17 | 136987 |
| 18 | 307086 |
| 19 | 691012 |
| 20 | 1559430 |
| 21 | 3528310 |
| 22 | 8003808 |
| 23 | 18203788 |
| 24 | 41504967 |
| 25 | 94842031 |
| 26 | 217147258 |
| 27 | 498061096 |
| 28 | 1144296424 |
| 29 | 2633227232 |
| 30 | 6068715880 |
| 31 | 14006305208 |
[1,1,2,4,8,16,32,64,129,265,558,1200,2613,5721, 12564,27702,61419,136987,307086,691012,1559430, 3528310,8003808,18203788,41504967,94842031, 217147258,498061096,1144296424,2633227232, 6068715880,14006305208] |