The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 37 |
| 3 | 275 |
| 4 | 2071 |
| 5 | 15781 |
| 6 | 121395 |
| 7 | 940915 |
| 8 | 7337560 |
| 9 | 57507892 |
| 10 | 452598884 |
| 11 | 3574599205 |
| 12 | 28316957579 |
| 13 | 224901946395 |
| 14 | 1790287826789 |
| 15 | 14279629073403 |
| 16 | 114097695427295 |
| 17 | 913103420246956 |
| 18 | 7317725618907700 |
| 19 | 58719917176448820 |
| 20 | 471733089071984376 |
[5,37,275,2071,15781,121395,940915,7337560, 57507892,452598884,3574599205,28316957579, 224901946395,1790287826789,14279629073403, 114097695427295,913103420246956,7317725618907700, 58719917176448820,471733089071984376] |