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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 195 |
| 4 | 63765 |
| 5 | 4294780073 |
| 6 | 18446744073639513336 |
| 7 | 340282366920938463463374607341656713953 |
| 8 | 115792089237316195423570985008687907853269984665640564039457583610129753447747 |
[1,2,9,195,63765,4294780073,18446744073639513336, 340282366920938463463374607341656713953, 11579208923731619542357098500868790785326998466564\ 0564039457583610129753447747] |