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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 7 |
| 6 | 28 |
| 7 | 114 |
| 8 | 465 |
| 9 | 1897 |
| 10 | 7739 |
| 11 | 31572 |
| 12 | 128801 |
| 13 | 525456 |
| 14 | 2143648 |
| 15 | 8745217 |
| 16 | 35676949 |
| 17 | 145547525 |
| 18 | 593775046 |
| 19 | 2422362079 |
| 20 | 9882257736 |
| 21 | 40315615410 |
| 22 | 164471408185 |
| 23 | 670976837021 |
| 24 | 2737314167775 |
| 25 | 11167134898976 |
[0,1,1,1,2,7,28,114,465,1897,7739,31572,128801, 525456,2143648,8745217,35676949,145547525, 593775046,2422362079,9882257736,40315615410, 164471408185,670976837021,2737314167775, 11167134898976] |