| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 25 |
| 4 | 59 |
| 5 | 131 |
| 6 | 277 |
| 7 | 573 |
| 8 | 1167 |
| 9 | 2359 |
| 10 | 4745 |
| 11 | 9521 |
| 12 | 19075 |
| 13 | 38187 |
| 14 | 76413 |
| 15 | 152869 |
| 16 | 305783 |
| 17 | 611615 |
| 18 | 1223281 |
| 19 | 2446617 |
| 20 | 4893291 |
| 21 | 9786643 |
| 22 | 19573349 |
| 23 | 39146765 |
| 24 | 78293599 |
| 25 | 156587271 |
| 26 | 313174617 |
| 27 | 626349313 |
| 28 | 1252698707 |
| 29 | 2505397499 |
| 30 | 5010795085 |
| 31 | 10021590261 |
[1,3,9,25,59,131,277,573,1167,2359,4745,9521, 19075,38187,76413,152869,305783,611615,1223281, 2446617,4893291,9786643,19573349,39146765, 78293599,156587271,313174617,626349313,1252698707, 2505397499,5010795085,10021590261] |
