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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 14 |
| 7 | 11 |
| 8 | 52 |
| 9 | 72 |
| 10 | 274 |
| 11 | 281 |
| 12 | 2155 |
| 13 | 1741 |
| 14 | 9650 |
| 15 | 20456 |
| 16 | 58071 |
| 17 | 79293 |
| 18 | 599452 |
| 19 | 566739 |
| 20 | 3668218 |
| 21 | 6931312 |
| 22 | 23776154 |
| 23 | 31008623 |
| 24 | 246109051 |
| 25 | 282422552 |
| 26 | 1357819070 |
| 27 | 2615067966 |
| 28 | 11358104142 |
[0,0,1,2,3,14,11,52,72,274,281,2155,1741,9650, 20456,58071,79293,599452,566739,3668218,6931312, 23776154,31008623,246109051,282422552,1357819070, 2615067966,11358104142] |