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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 63 |
| 3 | 364 |
| 4 | 2667 |
| 5 | 3906 |
| 6 | 22932 |
| 7 | 19608 |
| 8 | 97155 |
| 9 | 99463 |
| 10 | 246078 |
| 11 | 177156 |
| 12 | 970788 |
| 13 | 402234 |
| 14 | 1235304 |
| 15 | 1421784 |
| 16 | 3309747 |
| 17 | 1508598 |
| 18 | 6266169 |
| 19 | 2613660 |
| 20 | 10417302 |
| 21 | 7137312 |
| 22 | 11160828 |
| 23 | 6728904 |
| 24 | 35364420 |
| 25 | 12714681 |
| 26 | 25340742 |
| 27 | 25095280 |
| 28 | 52294536 |
| 29 | 21243690 |
| 30 | 89572392 |
| 31 | 29583456 |
[1,63,364,2667,3906,22932,19608,97155,99463, 246078,177156,970788,402234,1235304,1421784, 3309747,1508598,6266169,2613660,10417302,7137312, 11160828,6728904,35364420,12714681,25340742, 25095280,52294536,21243690,89572392,29583456] |