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| n | a(n) |
|---|---|
| 1 | 36 |
| 2 | 186 |
| 3 | 804 |
| 4 | 2968 |
| 5 | 10092 |
| 6 | 32712 |
| 7 | 103184 |
| 8 | 323816 |
| 9 | 1008108 |
| 10 | 3181896 |
| 11 | 10019520 |
| 12 | 32241100 |
| 13 | 103445952 |
| 14 | 339993680 |
| 15 | 1110750880 |
| 16 | 3717193820 |
| 17 | 12320871456 |
| 18 | 41800702528 |
| 19 | 140023160932 |
| 20 | 479705387124 |
| 21 | 1618787129800 |
| 22 | 5583205551016 |
[36,186,804,2968,10092,32712,103184,323816, 1008108,3181896,10019520,32241100,103445952, 339993680,1110750880,3717193820,12320871456, 41800702528,140023160932,479705387124, 1618787129800,5583205551016] |