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) |
|---|---|
| -2 | 1 |
| -1 | 0 |
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 14 |
| 5 | 87 |
| 6 | 101 |
| 7 | 289 |
| 8 | 679 |
| 9 | 1647 |
| 10 | 2326 |
| 11 | 3973 |
| 12 | 26164 |
| 13 | 30137 |
| 14 | 5420687 |
| 15 | 249381739 |
| 16 | 254802426 |
| 17 | 504184165 |
| 18 | 1767354921 |
| 19 | 4038894007 |
| 20 | 5806248928 |
| 21 | 9845142935 |
| 22 | 35341677733 |
| 23 | 221895209333 |
| 24 | 701027305732 |
| 25 | 922922515065 |
| 26 | 1623949820797 |
[1,0,1,1,2,3,14,87,101,289,679,1647,2326,3973, 26164,30137,5420687,249381739,254802426,504184165, 1767354921,4038894007,5806248928,9845142935, 35341677733,221895209333,701027305732, 922922515065,1623949820797] |