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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 24 |
| 4 | 256 |
| 5 | 4000 |
| 6 | 82944 |
| 7 | 2151296 |
| 8 | 67108864 |
| 9 | 2448880128 |
| 10 | 102400000000 |
| 11 | 4829076871168 |
| 12 | 253613523861504 |
| 13 | 14681377947951104 |
| 14 | 928873060356849664 |
| 15 | 63772920000000000000 |
| 16 | 4722366482869645213696 |
| 17 | 375183514207494575620096 |
[1,2,4,24,256,4000,82944,2151296,67108864, 2448880128,102400000000,4829076871168, 253613523861504,14681377947951104, 928873060356849664,63772920000000000000, 4722366482869645213696,375183514207494575620096] |