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) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 55 |
| 4 | 454 |
| 5 | 3850 |
| 6 | 33202 |
| 7 | 289606 |
| 8 | 2546773 |
| 9 | 22532905 |
| 10 | 200301403 |
| 11 | 1787165647 |
| 12 | 15993710992 |
| 13 | 143484404584 |
| 14 | 1289890360528 |
| 15 | 11615931435592 |
| 16 | 104760483639286 |
| 17 | 946005479787778 |
| 18 | 8552032916587066 |
| 19 | 77386316886280822 |
| 20 | 700854120680500744 |
[1,7,55,454,3850,33202,289606,2546773,22532905, 200301403,1787165647,15993710992,143484404584, 1289890360528,11615931435592,104760483639286, 946005479787778,8552032916587066, 77386316886280822,700854120680500744] |