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 | 3 |
| 1 | 10 |
| 2 | 26 |
| 3 | 62 |
| 4 | 140 |
| 5 | 306 |
| 6 | 654 |
| 7 | 1376 |
| 8 | 2862 |
| 9 | 5902 |
| 10 | 12092 |
| 11 | 24650 |
| 12 | 50054 |
| 13 | 101328 |
| 14 | 204630 |
| 15 | 412454 |
| 16 | 830076 |
| 17 | 1668514 |
| 18 | 3350558 |
| 19 | 6723008 |
| 20 | 13481438 |
| 21 | 27020190 |
| 22 | 54133116 |
| 23 | 108416282 |
| 24 | 217075350 |
| 25 | 434543536 |
| 26 | 869722694 |
| 27 | 1740473846 |
| 28 | 3482611772 |
| 29 | 6967916082 |
| 30 | 13940188782 |
| 31 | 27887426720 |
[3,10,26,62,140,306,654,1376,2862,5902,12092, 24650,50054,101328,204630,412454,830076,1668514, 3350558,6723008,13481438,27020190,54133116, 108416282,217075350,434543536,869722694, 1740473846,3482611772,6967916082,13940188782, 27887426720] |