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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 16 |
| 3 | 108 |
| 4 | 1360 |
| 5 | 41092 |
| 6 | 2405923 |
| 7 | 284247216 |
| 8 | 68394049216 |
| 9 | 33064776069834 |
| 10 | 31868588102983450 |
| 11 | 61446275576502856313 |
| 12 | 236673591523285699197386 |
| 13 | 1818567731722871472685169098 |
| 14 | 27879399799936252965503867197417 |
[2,16,108,1360,41092,2405923,284247216, 68394049216,33064776069834,31868588102983450, 61446275576502856313,236673591523285699197386, 1818567731722871472685169098, 27879399799936252965503867197417] |