The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 7 |
| 6 | 8 |
| 7 | 14 |
| 8 | 60 |
| 9 | 84 |
| 10 | 121 |
| 11 | 150 |
| 12 | 414 |
| 13 | 1560 |
| 14 | 1352 |
| 15 | 2304 |
| 16 | 7239 |
| 17 | 12480 |
| 18 | 10713 |
| 19 | 22400 |
| 20 | 67032 |
| 21 | 154056 |
| 22 | 166560 |
| 23 | 334880 |
| 24 | 770160 |
| 25 | 1322090 |
| 26 | 2020564 |
| 27 | 3712800 |
| 28 | 8461404 |
| 29 | 21427200 |
| 30 | 17008752 |
| 31 | 37733696 |
| 32 | 154277568 |
| 33 | 219104032 |
| 34 | 249664896 |
| 35 | 341958960 |
| 36 | 1575703584 |
| 37 | 1997069256 |
[1,1,3,7,8,14,60,84,121,150,414,1560,1352,2304, 7239,12480,10713,22400,67032,154056,166560,334880, 770160,1322090,2020564,3712800,8461404,21427200, 17008752,37733696,154277568,219104032,249664896, 341958960,1575703584,1997069256] |