The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 50 |
| 3 | 15 |
| 4 | 497 |
| 5 | 1822 |
| 6 | 7250 |
| 7 | 72678 |
| 8 | 448220 |
| 9 | 2829887 |
| 10 | 22791379 |
| 11 | 158206982 |
| 12 | 1095709939 |
| 13 | 8255370307 |
| 14 | 58809866037 |
| 15 | 419441406587 |
| 16 | 3078123625629 |
| 17 | 22120393560919 |
| 18 | 159228407927896 |
| 19 | 1157050202587522 |
| 20 | 8343547124616862 |
[8,50,15,497,1822,7250,72678,448220,2829887, 22791379,158206982,1095709939,8255370307, 58809866037,419441406587,3078123625629, 22120393560919,159228407927896,1157050202587522, 8343547124616862] |