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| n | a(n) |
|---|---|
| 1 | 36 |
| 2 | 154 |
| 3 | 600 |
| 4 | 2160 |
| 5 | 7520 |
| 6 | 25300 |
| 7 | 83944 |
| 8 | 275424 |
| 9 | 896780 |
| 10 | 2930032 |
| 11 | 9514764 |
| 12 | 31283068 |
| 13 | 102154068 |
| 14 | 339451248 |
| 15 | 1118239532 |
| 16 | 3758067700 |
| 17 | 12492423608 |
| 18 | 42409118936 |
| 19 | 142090246012 |
| 20 | 486328578676 |
| 21 | 1639690884804 |
| 22 | 5647319658404 |
| 23 | 19130793115084 |
[36,154,600,2160,7520,25300,83944,275424,896780, 2930032,9514764,31283068,102154068,339451248, 1118239532,3758067700,12492423608,42409118936, 142090246012,486328578676,1639690884804, 5647319658404,19130793115084] |