The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 11 |
| 4 | 130 |
| 5 | 670 |
| 6 | 9587 |
| 7 | 51055 |
| 8 | 832433 |
| 9 | 4403793 |
| 10 | 76270010 |
| 11 | 393405671 |
| 12 | 7110030015 |
| 13 | 35866532209 |
| 14 | 668872050090 |
| 15 | 3316350242047 |
| 16 | 63280853470227 |
| 17 | 309953030601699 |
| 18 | 6011655335449938 |
| 19 | 29208300615650596 |
| 20 | 572992311551819596 |
[1,5,11,130,670,9587,51055,832433,4403793, 76270010,393405671,7110030015,35866532209, 668872050090,3316350242047,63280853470227, 309953030601699,6011655335449938, 29208300615650596,572992311551819596] |