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 | 13 |
| 4 | 85 |
| 5 | 706 |
| 6 | 7042 |
| 7 | 81887 |
| 8 | 1081257 |
| 9 | 15911488 |
| 10 | 257476901 |
| 11 | 4533396418 |
| 12 | 86110501919 |
| 13 | 1752312402881 |
| 14 | 37982176570353 |
| 15 | 872648321081531 |
| 16 | 21162807249523025 |
| 17 | 539772371783003416 |
| 18 | 14433746294326451095 |
[1,1,3,13,85,706,7042,81887,1081257,15911488, 257476901,4533396418,86110501919,1752312402881, 37982176570353,872648321081531,21162807249523025, 539772371783003416,14433746294326451095] |