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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 12 |
| 5 | 38 |
| 6 | 567 |
| 7 | 1737 |
| 8 | 8340 |
| 9 | 16085 |
| 10 | 17553 |
| 11 | 17933 |
| 12 | 36998 |
| 13 | 40442 |
| 14 | 119812 |
| 15 | 173737 |
| 16 | 378812 |
| 17 | 1328121 |
| 18 | 1751497 |
| 19 | 1775707 |
| 20 | 4427781 |
| 21 | 8211880 |
| 22 | 17909283 |
| 23 | 40439558 |
| 24 | 441564381 |
| 25 | 828223250 |
| 26 | 5602945243 |
| 27 | 8227749490 |
| 28 | 12900321392 |
| 29 | 16028474345 |
| 30 | 17552348197 |
| 31 | 37196982752 |
[0,1,5,12,38,567,1737,8340,16085,17553,17933, 36998,40442,119812,173737,378812,1328121,1751497, 1775707,4427781,8211880,17909283,40439558, 441564381,828223250,5602945243,8227749490, 12900321392,16028474345,17552348197,37196982752] |