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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 34 |
| 3 | 148 |
| 4 | 616 |
| 5 | 2512 |
| 6 | 10144 |
| 7 | 40768 |
| 8 | 163456 |
| 9 | 654592 |
| 10 | 2619904 |
| 11 | 10482688 |
| 12 | 41936896 |
| 13 | 167759872 |
| 14 | 671064064 |
| 15 | 2684305408 |
| 16 | 10737319936 |
| 17 | 42949476352 |
| 18 | 171798298624 |
| 19 | 687193980928 |
| 20 | 2748777496576 |
| 21 | 10995113132032 |
| 22 | 43980458819584 |
[1,7,34,148,616,2512,10144,40768,163456,654592, 2619904,10482688,41936896,167759872,671064064, 2684305408,10737319936,42949476352,171798298624, 687193980928,2748777496576,10995113132032, 43980458819584] |