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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 7 |
| 4 | 20 |
| 5 | 15 |
| 6 | 88 |
| 7 | 95 |
| 8 | 464 |
| 9 | 319 |
| 10 | 1632 |
| 11 | 1151 |
| 12 | 7232 |
| 13 | 5887 |
| 14 | 23424 |
| 15 | 29183 |
| 16 | 77056 |
| 17 | 125951 |
| 18 | 493056 |
| 19 | 403455 |
| 20 | 1778688 |
| 21 | 1830911 |
| 22 | 4454400 |
| 23 | 7020543 |
| 24 | 29872128 |
| 25 | 27443199 |
| 26 | 107896832 |
| 27 | 34766847 |
| 28 | 297680896 |
| 29 | 142540799 |
| 30 | 1139245056 |
| 31 | 967966719 |
| 32 | 5750194176 |
| 33 | 1177288703 |
[1,1,6,7,20,15,88,95,464,319,1632,1151,7232,5887, 23424,29183,77056,125951,493056,403455,1778688, 1830911,4454400,7020543,29872128,27443199, 107896832,34766847,297680896,142540799,1139245056, 967966719,5750194176,1177288703] |