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 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 20 |
| 6 | 82 |
| 7 | 252 |
| 8 | 1074 |
| 9 | 7912 |
| 10 | 39552 |
| 11 | 152680 |
| 12 | 776094 |
| 13 | 5550310 |
| 14 | 30026848 |
| 15 | 108376910 |
[1,1,1,2,4,20,82,252,1074,7912,39552,152680, 776094,5550310,30026848,108376910] |