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 | 5 |
| 3 | 19 |
| 4 | 79 |
| 5 | 337 |
| 6 | 1487 |
| 7 | 6667 |
| 8 | 30477 |
| 9 | 140415 |
| 10 | 654037 |
| 11 | 3065781 |
| 12 | 14464051 |
| 13 | 68594987 |
| 14 | 326693571 |
| 15 | 1561823519 |
| 16 | 7491695533 |
| 17 | 36035788369 |
| 18 | 173781740083 |
| 19 | 839928505357 |
| 20 | 4067694903275 |
| 21 | 19735045783185 |
| 22 | 95901855236635 |
| 23 | 466718405307693 |
| 24 | 2274377462525147 |
| 25 | 11096773439811825 |
| 26 | 54202198678000775 |
| 27 | 265021403282703067 |
[1,1,5,19,79,337,1487,6667,30477,140415,654037, 3065781,14464051,68594987,326693571,1561823519, 7491695533,36035788369,173781740083,839928505357, 4067694903275,19735045783185,95901855236635, 466718405307693,2274377462525147, 11096773439811825,54202198678000775, 265021403282703067] |