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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 22 |
| 3 | 93 |
| 4 | 408 |
| 5 | 1793 |
| 6 | 7844 |
| 7 | 34609 |
| 8 | 152421 |
| 9 | 672446 |
| 10 | 2965705 |
| 11 | 13084976 |
| 12 | 57727896 |
| 13 | 254711179 |
| 14 | 1123832479 |
| 15 | 4958718969 |
| 16 | 21879386505 |
| 17 | 96539467026 |
| 18 | 425965183425 |
| 19 | 1879509395614 |
| 20 | 8293059346003 |
| 21 | 36591936428964 |
| 22 | 161456668184975 |
[7,22,93,408,1793,7844,34609,152421,672446, 2965705,13084976,57727896,254711179,1123832479, 4958718969,21879386505,96539467026,425965183425, 1879509395614,8293059346003,36591936428964, 161456668184975] |