The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 196 |
| 3 | 6174 |
| 4 | 115248 |
| 5 | 1680700 |
| 6 | 21176820 |
| 7 | 242121642 |
| 8 | 2582630848 |
| 9 | 26149137336 |
| 10 | 254227724100 |
| 11 | 2392565359030 |
| 12 | 21924598926384 |
| 13 | 196490913105396 |
| 14 | 1728112389619252 |
| 15 | 14954818756320450 |
| 16 | 127614453387267840 |
[0,196,6174,115248,1680700,21176820,242121642, 2582630848,26149137336,254227724100,2392565359030, 21924598926384,196490913105396,1728112389619252, 14954818756320450,127614453387267840] |