The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 25 |
| 3 | 137 |
| 4 | 649 |
| 5 | 2825 |
| 6 | 11785 |
| 7 | 48137 |
| 8 | 194569 |
| 9 | 782345 |
| 10 | 3137545 |
| 11 | 12566537 |
| 12 | 50298889 |
| 13 | 201261065 |
| 14 | 805175305 |
| 15 | 3220963337 |
[1,5,25,137,649,2825,11785,48137,194569,782345, 3137545,12566537,50298889,201261065,805175305, 3220963337] |