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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 3 |
| 9 | 11 |
| 10 | 21 |
| 11 | 39 |
| 12 | 89 |
| 13 | 219 |
| 14 | 569 |
| 15 | 1579 |
| 16 | 5069 |
| 17 | 17101 |
| 18 | 62347 |
| 19 | 244493 |
| 20 | 1058973 |
| 21 | 4994427 |
| 22 | 25066841 |
| 23 | 137507293 |
| 24 | 817420471 |
[1,1,1,1,1,1,1,3,11,21,39,89,219,569,1579,5069, 17101,62347,244493,1058973,4994427,25066841, 137507293,817420471] |