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 | 2 |
| 5 | 2 |
| 6 | 4 |
| 7 | 6 |
| 8 | 9 |
| 9 | 11 |
| 10 | 20 |
| 11 | 28 |
| 12 | 40 |
| 13 | 58 |
| 14 | 82 |
| 15 | 110 |
| 16 | 159 |
| 17 | 217 |
| 18 | 305 |
| 19 | 420 |
| 20 | 570 |
| 21 | 767 |
| 22 | 1042 |
[1,1,1,2,2,4,6,9,11,20,28,40,58,82,110,159,217, 305,420,570,767,1042] |