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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 137 |
| 3 | 2856 |
| 4 | 60807 |
| 5 | 1299057 |
| 6 | 27767394 |
| 7 | 593562702 |
| 8 | 12688126159 |
| 9 | 271223239234 |
| 10 | 5797699341153 |
| 11 | 123932233563380 |
| 12 | 2649188126866350 |
| 13 | 56629314186026164 |
| 14 | 1210513943745878094 |
| 15 | 25876068208481143920 |
| 16 | 553129442930337241907 |
[7,137,2856,60807,1299057,27767394,593562702, 12688126159,271223239234,5797699341153, 123932233563380,2649188126866350, 56629314186026164,1210513943745878094, 25876068208481143920,553129442930337241907] |