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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 20 |
| 3 | 32 |
| 4 | 320 |
| 5 | 2048 |
| 6 | 2216 |
| 7 | 8192 |
| 8 | 13312 |
| 9 | 87040 |
| 10 | 218432 |
| 11 | 524288 |
| 12 | 89478400 |
| 13 | 536870912 |
| 14 | 137438953472 |
| 15 | 250199979283796 |
| 16 | 9007199254740992 |
| 17 | 63800994005254144 |
| 18 | 96076791692656640 |
| 19 | 382805968326492160 |
| 20 | 576460752303423488 |
| 21 | 2305843009213693952 |
| 22 | 4099276399740365440 |
[8,20,32,320,2048,2216,8192,13312,87040,218432, 524288,89478400,536870912,137438953472, 250199979283796,9007199254740992, 63800994005254144,96076791692656640, 382805968326492160,576460752303423488, 2305843009213693952,4099276399740365440] |