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 | 2 |
| 3 | 4 |
| 4 | 12 |
| 5 | 40 |
| 6 | 116 |
| 7 | 200 |
| 8 | 444 |
| 9 | 760 |
| 10 | 2160 |
| 11 | 4368 |
| 12 | 7852 |
| 13 | 14040 |
| 14 | 24284 |
| 15 | 42312 |
| 16 | 79340 |
| 17 | 152764 |
| 18 | 320920 |
| 19 | 688780 |
| 20 | 1577244 |
| 21 | 3763512 |
| 22 | 9412948 |
[1,2,4,12,40,116,200,444,760,2160,4368,7852,14040, 24284,42312,79340,152764,320920,688780,1577244, 3763512,9412948] |