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 | 1 |
| 2 | 5 |
| 3 | 19 |
| 4 | 91 |
| 5 | 391 |
| 6 | 1911 |
| 7 | 8745 |
| 8 | 43141 |
| 9 | 203145 |
| 10 | 1007609 |
| 11 | 4826733 |
| 12 | 24013317 |
| 13 | 116273537 |
| 14 | 579500509 |
| 15 | 2826359467 |
| 16 | 14101820227 |
| 17 | 69129752095 |
| 18 | 345154523255 |
| 19 | 1698332231795 |
| 20 | 8483340867615 |
| 21 | 41859508101555 |
| 22 | 209155092781463 |
| 23 | 1034270680208087 |
| 24 | 5168880642818399 |
| 25 | 25603548543186475 |
| 26 | 127974318768638411 |
[1,1,5,19,91,391,1911,8745,43141,203145,1007609, 4826733,24013317,116273537,579500509,2826359467, 14101820227,69129752095,345154523255, 1698332231795,8483340867615,41859508101555, 209155092781463,1034270680208087,5168880642818399, 25603548543186475,127974318768638411] |