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) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 17 |
| 4 | 53 |
| 5 | 197 |
| 6 | 373 |
| 7 | 983 |
| 8 | 3803 |
| 9 | 6709 |
| 10 | 17333 |
| 11 | 43783 |
| 12 | 103681 |
| 13 | 317789 |
| 14 | 785671 |
| 15 | 2177321 |
| 16 | 5581493 |
| 17 | 20632861 |
| 18 | 38770357 |
| 19 | 126491971 |
| 20 | 331160281 |
| 21 | 1070825143 |
| 22 | 1836305137 |
| 23 | 6643521067 |
| 24 | 10749957121 |
| 25 | 32951279111 |
| 26 | 86252640919 |
| 27 | 213265164691 |
| 28 | 591286712167 |
| 29 | 2126709216773 |
[2,7,17,53,197,373,983,3803,6709,17333,43783, 103681,317789,785671,2177321,5581493,20632861, 38770357,126491971,331160281,1070825143, 1836305137,6643521067,10749957121,32951279111, 86252640919,213265164691,591286712167, 2126709216773] |