The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 6 |
| 5 | 32 |
| 6 | 171 |
| 7 | 944 |
| 8 | 5444 |
| 9 | 32919 |
| 10 | 208816 |
| 11 | 1388240 |
| 12 | 9657929 |
| 13 | 70187054 |
| 14 | 531857288 |
| 15 | 4194927585 |
| 16 | 34379859346 |
| 17 | 292303350268 |
| 18 | 2574284790795 |
| 19 | 23450837821836 |
| 20 | 220681535036288 |
| 21 | 2142618638738279 |
| 22 | 21438586249394500 |
| 23 | 220827871704427308 |
| 24 | 2339281577294955745 |
[1,6,32,171,944,5444,32919,208816,1388240,9657929, 70187054,531857288,4194927585,34379859346, 292303350268,2574284790795,23450837821836, 220681535036288,2142618638738279, 21438586249394500,220827871704427308, 2339281577294955745] |