The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 24 |
| 3 | 36 |
| 4 | 166 |
| 5 | 487 |
| 6 | 2130 |
| 7 | 7433 |
| 8 | 30191 |
| 9 | 112815 |
| 10 | 444834 |
| 11 | 1703258 |
| 12 | 6646733 |
| 13 | 25671427 |
| 14 | 99805187 |
| 15 | 386632624 |
| 16 | 1501187933 |
| 17 | 5821487287 |
| 18 | 22593096132 |
| 19 | 87646018561 |
| 20 | 340100396970 |
| 21 | 1319526895683 |
| 22 | 5120003868457 |
| 23 | 19865539519766 |
| 24 | 77080509424841 |
[1,24,36,166,487,2130,7433,30191,112815,444834, 1703258,6646733,25671427,99805187,386632624, 1501187933,5821487287,22593096132,87646018561, 340100396970,1319526895683,5120003868457, 19865539519766,77080509424841] |