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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 126 |
| 3 | 1718 |
| 4 | 22946 |
| 5 | 311144 |
| 6 | 4217066 |
| 7 | 57127796 |
| 8 | 773948962 |
| 9 | 10485233258 |
| 10 | 142050385280 |
| 11 | 1924452482144 |
| 12 | 26071860295098 |
| 13 | 353213105139604 |
| 14 | 4785216541174944 |
| 15 | 64828561353680056 |
| 16 | 878276318748587482 |
[7,126,1718,22946,311144,4217066,57127796, 773948962,10485233258,142050385280,1924452482144, 26071860295098,353213105139604,4785216541174944, 64828561353680056,878276318748587482] |