The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 1 |
| 5 | 20 |
| 6 | 4 |
| 7 | 77 |
| 8 | 43 |
| 9 | 472 |
| 10 | 238 |
| 11 | 10 |
| 12 | 2585 |
| 13 | 2385 |
| 14 | 70 |
| 15 | 21968 |
| 16 | 16504 |
| 17 | 1848 |
| 18 | 157113 |
| 19 | 189695 |
| 20 | 15792 |
| 21 | 280 |
| 22 | 1724064 |
| 23 | 1591082 |
| 24 | 310854 |
| 25 | 2800 |
| 26 | 15229645 |
| 27 | 21449481 |
| 28 | 3100614 |
| 29 | 137060 |
| 30 | 204738624 |
| 31 | 213397204 |
| 32 | 59267252 |
| 33 | 1583120 |
| 34 | 15400 |
| 35 | 2151199429 |
| 36 | 3347368503 |
| 37 | 676271024 |
| 38 | 51981644 |
| 39 | 200200 |
[1,1,2,5,1,20,4,77,43,472,238,10,2585,2385,70, 21968,16504,1848,157113,189695,15792,280,1724064, 1591082,310854,2800,15229645,21449481,3100614, 137060,204738624,213397204,59267252,1583120,15400, 2151199429,3347368503,676271024,51981644,200200] |