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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 23 |
| 3 | 159 |
| 4 | 895 |
| 5 | 22527 |
| 6 | 106495 |
| 7 | 2228223 |
| 8 | 9961471 |
| 9 | 192937983 |
| 10 | 15569256447 |
| 11 | 66571993087 |
| 12 | 5085241278463 |
| 13 | 90159953477631 |
| 14 | 378231999954943 |
| 15 | 6614661952700415 |
| 16 | 477381560501272575 |
| 17 | 34011184385901985791 |
[7,23,159,895,22527,106495,2228223,9961471, 192937983,15569256447,66571993087,5085241278463, 90159953477631,378231999954943,6614661952700415, 477381560501272575,34011184385901985791] |