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 | 2 |
| 2 | 5 |
| 3 | 17 |
| 4 | 55 |
| 5 | 200 |
| 6 | 737 |
| 7 | 2810 |
| 8 | 10993 |
| 9 | 43563 |
| 10 | 176307 |
| 11 | 717457 |
| 12 | 2968511 |
| 13 | 12319177 |
| 14 | 51739914 |
| 15 | 218083622 |
| 16 | 926385446 |
| 17 | 3953155545 |
| 18 | 16951252816 |
| 19 | 73047645626 |
| 20 | 315747238313 |
| 21 | 1371343273755 |
| 22 | 5968518947214 |
| 23 | 26086649250226 |
| 24 | 114220422192153 |
| 25 | 501836040308036 |
| 26 | 2208889047373640 |
| 27 | 9748272309261590 |
[1,2,5,17,55,200,737,2810,10993,43563,176307, 717457,2968511,12319177,51739914,218083622, 926385446,3953155545,16951252816,73047645626, 315747238313,1371343273755,5968518947214, 26086649250226,114220422192153,501836040308036, 2208889047373640,9748272309261590] |