The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 7 |
| 3 | 14 |
| 4 | 26 |
| 5 | 48 |
| 6 | 91 |
| 7 | 178 |
| 8 | 357 |
| 9 | 728 |
| 10 | 1497 |
| 11 | 3083 |
| 12 | 6331 |
| 13 | 12937 |
| 14 | 26292 |
| 15 | 53144 |
| 16 | 106846 |
| 17 | 213676 |
| 18 | 425126 |
| 19 | 841854 |
| 20 | 1660587 |
| 21 | 3266550 |
| 22 | 6416933 |
| 23 | 12607706 |
| 24 | 24811601 |
| 25 | 48969428 |
| 26 | 97010347 |
| 27 | 192968489 |
| 28 | 385347506 |
| 29 | 772039743 |
| 30 | 1550372341 |
| 31 | 3117282657 |
[1,3,7,14,26,48,91,178,357,728,1497,3083,6331, 12937,26292,53144,106846,213676,425126,841854, 1660587,3266550,6416933,12607706,24811601, 48969428,97010347,192968489,385347506,772039743, 1550372341,3117282657] |