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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 13 |
| 4 | 27 |
| 5 | 52 |
| 6 | 110 |
| 7 | 211 |
| 8 | 444 |
| 9 | 834 |
| 10 | 1761 |
| 11 | 3387 |
| 12 | 7110 |
| 13 | 13357 |
| 14 | 28187 |
| 15 | 54188 |
| 16 | 113750 |
| 17 | 213755 |
| 18 | 450948 |
| 19 | 867054 |
| 20 | 1819931 |
| 21 | 3420076 |
| 22 | 7215326 |
| 23 | 13873075 |
| 24 | 29118668 |
| 25 | 54720818 |
| 26 | 115445453 |
| 27 | 221968691 |
| 28 | 465897164 |
| 29 | 875530546 |
| 30 | 1847121613 |
| 31 | 3551504691 |
| 32 | 7454357196 |
[1,3,6,13,27,52,110,211,444,834,1761,3387,7110, 13357,28187,54188,113750,213755,450948,867054, 1819931,3420076,7215326,13873075,29118668, 54720818,115445453,221968691,465897164,875530546, 1847121613,3551504691,7454357196] |