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| n | a(n) |
|---|---|
| 1 | 744 |
| 2 | 2592 |
| 3 | 8328 |
| 4 | 30300 |
| 5 | 102000 |
| 6 | 382036 |
| 7 | 1330480 |
| 8 | 5080484 |
| 9 | 18163048 |
| 10 | 70306060 |
| 11 | 256589296 |
| 12 | 1003233148 |
| 13 | 3722094784 |
| 14 | 14665343468 |
| 15 | 55134285800 |
| 16 | 218558955780 |
| 17 | 830555412752 |
| 18 | 3308709067460 |
| 19 | 12685331083184 |
| 20 | 50741901100676 |
[744,2592,8328,30300,102000,382036,1330480, 5080484,18163048,70306060,256589296,1003233148, 3722094784,14665343468,55134285800,218558955780, 830555412752,3308709067460,12685331083184, 50741901100676] |