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 | 7 |
| 4 | 9 |
| 5 | 31 |
| 6 | 403 |
| 7 | 1597 |
| 8 | 7913 |
| 9 | 68551 |
| 10 | 539691 |
| 11 | 4359037 |
| 12 | 48419715 |
| 13 | 560648557 |
| 14 | 4985097601 |
| 15 | 59798395027 |
| 16 | 869794249513 |
| 17 | 11143895125527 |
| 18 | 159575614945315 |
| 19 | 2593765421983597 |
| 20 | 38615447492264219 |
| 21 | 642012651525487501 |
| 22 | 11768461266053785921 |
| 23 | 220201814964135821967 |
[1,1,1,7,9,31,403,1597,7913,68551,539691,4359037, 48419715,560648557,4985097601,59798395027, 869794249513,11143895125527,159575614945315, 2593765421983597,38615447492264219, 642012651525487501,11768461266053785921, 220201814964135821967] |