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 | 2 |
| 2 | 7 |
| 3 | 25 |
| 4 | 95 |
| 5 | 384 |
| 6 | 1559 |
| 7 | 6606 |
| 8 | 28013 |
| 9 | 121326 |
| 10 | 528787 |
| 11 | 2323865 |
| 12 | 10305291 |
| 13 | 45842790 |
| 14 | 205583679 |
| 15 | 924004141 |
| 16 | 4176135747 |
| 17 | 18927081330 |
| 18 | 86065623587 |
| 19 | 392613070741 |
| 20 | 1794642375921 |
| 21 | 8228016991562 |
| 22 | 37783626445495 |
| 23 | 173921566304244 |
| 24 | 801849368774407 |
| 25 | 3703338607359942 |
| 26 | 17131714254509809 |
| 27 | 79355150543712787 |
[1,2,7,25,95,384,1559,6606,28013,121326,528787, 2323865,10305291,45842790,205583679,924004141, 4176135747,18927081330,86065623587,392613070741, 1794642375921,8228016991562,37783626445495, 173921566304244,801849368774407,3703338607359942, 17131714254509809,79355150543712787] |