| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 23 |
| 3 | 93 |
| 4 | 359 |
| 5 | 1335 |
| 6 | 4873 |
| 7 | 17535 |
| 8 | 62601 |
| 9 | 222181 |
| 10 | 785855 |
| 11 | 2772717 |
| 12 | 9768351 |
| 13 | 34378167 |
| 14 | 120910529 |
| 15 | 425062511 |
| 16 | 1493898001 |
| 17 | 5249371781 |
| 18 | 18443445415 |
| 19 | 64795091709 |
| 20 | 227625068503 |
| 21 | 799619495287 |
| 22 | 2808906276921 |
| 23 | 9866994688223 |
| 24 | 34659998140825 |
| 25 | 121750158651877 |
| 26 | 427670046315727 |
| 27 | 1502266603229837 |
| 28 | 5276968090316303 |
[1,5,23,93,359,1335,4873,17535,62601,222181, 785855,2772717,9768351,34378167,120910529, 425062511,1493898001,5249371781,18443445415, 64795091709,227625068503,799619495287, 2808906276921,9866994688223,34659998140825, 121750158651877,427670046315727,1502266603229837, 5276968090316303] |