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| n | a(n) |
|---|---|
| 1 | 512 |
| 2 | 1408 |
| 3 | 4184 |
| 4 | 12549 |
| 5 | 35540 |
| 6 | 98676 |
| 7 | 281136 |
| 8 | 819453 |
| 9 | 2358888 |
| 10 | 6678576 |
| 11 | 18944656 |
| 12 | 54386801 |
| 13 | 156395364 |
| 14 | 446683118 |
| 15 | 1271579860 |
| 16 | 3632749828 |
| 17 | 10409795664 |
| 18 | 29790138680 |
| 19 | 85049570304 |
| 20 | 242860722210 |
| 21 | 694569186912 |
| 22 | 1987109647472 |
[512,1408,4184,12549,35540,98676,281136,819453, 2358888,6678576,18944656,54386801,156395364, 446683118,1271579860,3632749828,10409795664, 29790138680,85049570304,242860722210,694569186912, 1987109647472] |