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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 3 |
| 8 | 7 |
| 9 | 8 |
| 10 | 15 |
| 11 | 19 |
| 12 | 37 |
| 13 | 48 |
| 14 | 87 |
| 15 | 126 |
| 16 | 227 |
| 17 | 342 |
| 18 | 611 |
| 19 | 964 |
| 20 | 1719 |
| 21 | 2806 |
| 22 | 4975 |
| 23 | 8327 |
| 24 | 14782 |
| 25 | 25157 |
| 26 | 44609 |
| 27 | 76972 |
| 28 | 136622 |
| 29 | 237987 |
| 30 | 422881 |
| 31 | 742149 |
| 32 | 1320825 |
| 33 | 2331491 |
| 34 | 4156392 |
| 35 | 7370868 |
| 36 | 13164429 |
| 37 | 23433637 |
| 38 | 41928557 |
| 39 | 74871434 |
| 40 | 134203411 |
| 41 | 240284935 |
| 42 | 431437069 |
[0,0,0,1,1,3,3,7,8,15,19,37,48,87,126,227,342,611, 964,1719,2806,4975,8327,14782,25157,44609,76972, 136622,237987,422881,742149,1320825,2331491, 4156392,7370868,13164429,23433637,41928557, 74871434,134203411,240284935,431437069] |