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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 18 |
| 4 | 46 |
| 5 | 107 |
| 6 | 241 |
| 7 | 535 |
| 8 | 1178 |
| 9 | 2569 |
| 10 | 5546 |
| 11 | 11859 |
| 12 | 25156 |
| 13 | 53058 |
| 14 | 111379 |
| 15 | 232966 |
| 16 | 486023 |
| 17 | 1012185 |
| 18 | 2104729 |
| 19 | 4370644 |
| 20 | 9064924 |
| 21 | 18778766 |
| 22 | 38856079 |
| 23 | 80307630 |
| 24 | 165790125 |
| 25 | 341872016 |
| 26 | 704171185 |
| 27 | 1448812630 |
| 28 | 2977673003 |
| 29 | 6113469501 |
| 30 | 12538958895 |
| 31 | 25693167881 |
| 32 | 52598980642 |
[1,6,18,46,107,241,535,1178,2569,5546,11859,25156, 53058,111379,232966,486023,1012185,2104729, 4370644,9064924,18778766,38856079,80307630, 165790125,341872016,704171185,1448812630, 2977673003,6113469501,12538958895,25693167881, 52598980642] |