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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 34 |
| 4 | 155 |
| 5 | 720 |
| 6 | 3415 |
| 7 | 16383 |
| 8 | 79328 |
| 9 | 386470 |
| 10 | 1891850 |
| 11 | 9294566 |
| 12 | 45795647 |
| 13 | 226153248 |
| 14 | 1118854674 |
| 15 | 5543559786 |
| 16 | 27500181154 |
| 17 | 136560136318 |
| 18 | 678706790731 |
| 19 | 3375612040066 |
| 20 | 16799183694507 |
| 21 | 83647085652955 |
| 22 | 416685864883258 |
| 23 | 2076517827764731 |
| 24 | 10351646065062625 |
| 25 | 51619218086553474 |
| 26 | 257469584368181012 |
[1,2,8,34,155,720,3415,16383,79328,386470,1891850, 9294566,45795647,226153248,1118854674,5543559786, 27500181154,136560136318,678706790731, 3375612040066,16799183694507,83647085652955, 416685864883258,2076517827764731, 10351646065062625,51619218086553474, 257469584368181012] |