| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 7 |
| 3 | 12 |
| 4 | 26 |
| 5 | 45 |
| 6 | 97 |
| 7 | 168 |
| 8 | 362 |
| 9 | 627 |
| 10 | 1351 |
| 11 | 2340 |
| 12 | 5042 |
| 13 | 8733 |
| 14 | 18817 |
| 15 | 32592 |
| 16 | 70226 |
| 17 | 121635 |
| 18 | 262087 |
| 19 | 453948 |
| 20 | 978122 |
| 21 | 1694157 |
| 22 | 3650401 |
| 23 | 6322680 |
| 24 | 13623482 |
| 25 | 23596563 |
| 26 | 50843527 |
| 27 | 88063572 |
| 28 | 189750626 |
| 29 | 328657725 |
| 30 | 708158977 |
| 31 | 1226567328 |
| 32 | 2642885282 |
| 33 | 4577611587 |
[2,3,7,12,26,45,97,168,362,627,1351,2340,5042, 8733,18817,32592,70226,121635,262087,453948, 978122,1694157,3650401,6322680,13623482,23596563, 50843527,88063572,189750626,328657725,708158977, 1226567328,2642885282,4577611587] |