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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 10 |
| 3 | 36 |
| 4 | 135 |
| 5 | 2 |
| 6 | 519 |
| 7 | 24 |
| 8 | 2034 |
| 9 | 180 |
| 10 | 5 |
| 11 | 8100 |
| 12 | 1110 |
| 13 | 75 |
| 14 | 32688 |
| 15 | 6210 |
| 16 | 675 |
| 17 | 14 |
| 18 | 133380 |
| 19 | 32886 |
| 20 | 4851 |
| 21 | 252 |
| 22 | 549342 |
| 23 | 168210 |
| 24 | 30996 |
| 25 | 2646 |
| 26 | 42 |
| 27 | 2280690 |
| 28 | 840132 |
| 29 | 184842 |
| 30 | 21672 |
| 31 | 882 |
| 32 | 9534591 |
| 33 | 4124682 |
| 34 | 1053486 |
| 35 | 154980 |
| 36 | 10584 |
| 37 | 132 |
| 38 | 40103019 |
[1,3,10,36,135,2,519,24,2034,180,5,8100,1110,75, 32688,6210,675,14,133380,32886,4851,252,549342, 168210,30996,2646,42,2280690,840132,184842,21672, 882,9534591,4124682,1053486,154980,10584,132, 40103019] |