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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 29 |
| 4 | 127 |
| 5 | 528 |
| 6 | 2405 |
| 7 | 10591 |
| 8 | 49296 |
| 9 | 223989 |
| 10 | 1056721 |
| 11 | 4896369 |
| 12 | 23312282 |
| 13 | 109466674 |
| 14 | 524642598 |
| 15 | 2487292994 |
| 16 | 11980610025 |
| 17 | 57209812926 |
| 18 | 276644569342 |
| 19 | 1328428857274 |
| 20 | 6444039283829 |
| 21 | 31081477237993 |
| 22 | 151163732596780 |
| 23 | 731737282128490 |
| 24 | 3566520834933610 |
| 25 | 17315850275994289 |
| 26 | 84554376280699649 |
[1,2,8,29,127,528,2405,10591,49296,223989,1056721, 4896369,23312282,109466674,524642598,2487292994, 11980610025,57209812926,276644569342, 1328428857274,6444039283829,31081477237993, 151163732596780,731737282128490,3566520834933610, 17315850275994289,84554376280699649] |