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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 100 |
| 6 | 408 |
| 7 | 1624 |
| 8 | 6336 |
| 9 | 24336 |
| 10 | 92320 |
| 11 | 346720 |
| 12 | 1291392 |
| 13 | 4776512 |
| 14 | 17562496 |
| 15 | 64245120 |
| 16 | 233969664 |
| 17 | 848748800 |
| 18 | 3068269056 |
| 19 | 11057710592 |
| 20 | 39740405760 |
| 21 | 142466343936 |
| 22 | 509572929536 |
| 23 | 1818872207360 |
| 24 | 6480018948096 |
[0,1,2,6,24,100,408,1624,6336,24336,92320,346720, 1291392,4776512,17562496,64245120,233969664, 848748800,3068269056,11057710592,39740405760, 142466343936,509572929536,1818872207360, 6480018948096] |