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 | 3 |
| 3 | 12 |
| 4 | 61 |
| 5 | 372 |
| 6 | 2639 |
| 7 | 21280 |
| 8 | 191833 |
| 9 | 1908688 |
| 10 | 20750331 |
| 11 | 244478784 |
| 12 | 3100597333 |
| 13 | 42088689216 |
| 14 | 608543191559 |
| 15 | 9332562964480 |
| 16 | 151252803045937 |
| 17 | 2582250195499264 |
| 18 | 46306562212010355 |
| 19 | 870011934425816064 |
| 20 | 17086276243125287917 |
[1,1,3,12,61,372,2639,21280,191833,1908688, 20750331,244478784,3100597333,42088689216, 608543191559,9332562964480,151252803045937, 2582250195499264,46306562212010355, 870011934425816064,17086276243125287917] |