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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 37 |
| 3 | 65 |
| 4 | 308 |
| 5 | 654 |
| 6 | 7214 |
| 7 | 21992 |
| 8 | 49850 |
| 9 | 222791 |
| 10 | 1146922 |
| 11 | 1912101 |
| 12 | 6372680 |
| 13 | 23077800 |
[7,37,65,308,654,7214,21992,49850,222791,1146922, 1912101,6372680,23077800] |