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| n | a(n) |
|---|---|
| 1 | 392 |
| 2 | 1120 |
| 3 | 2744 |
| 4 | 8392 |
| 5 | 22568 |
| 6 | 71896 |
| 7 | 206360 |
| 8 | 675064 |
| 9 | 2026472 |
| 10 | 6751000 |
| 11 | 20907224 |
| 12 | 70560952 |
| 13 | 223435688 |
| 14 | 761260696 |
| 15 | 2450452760 |
| 16 | 8407382584 |
| 17 | 27402409832 |
| 18 | 94504374040 |
| 19 | 311023311704 |
| 20 | 1076774857912 |
| 21 | 3571073152808 |
| 22 | 12398475609496 |
[392,1120,2744,8392,22568,71896,206360,675064, 2026472,6751000,20907224,70560952,223435688, 761260696,2450452760,8407382584,27402409832, 94504374040,311023311704,1076774857912, 3571073152808,12398475609496] |