The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 7 |
| 5 | 8 |
| 6 | 15 |
| 7 | 28 |
| 8 | 65 |
| 9 | 87 |
| 10 | 134 |
| 11 | 271 |
| 12 | 272 |
| 13 | 577 |
| 14 | 578 |
| 15 | 1227 |
| 16 | 1844 |
| 17 | 3695 |
| 18 | 4624 |
| 19 | 9825 |
| 20 | 18562 |
| 21 | 37127 |
| 22 | 37537 |
| 23 | 37538 |
| 24 | 75627 |
| 25 | 113480 |
| 26 | 283799 |
| 27 | 283800 |
| 28 | 1198543 |
| 29 | 1201967 |
| 30 | 1302144 |
| 31 | 3907583 |
| 32 | 3907584 |
| 33 | 11948189 |
| 34 | 13143019 |
| 35 | 13151298 |
| 36 | 39453911 |
| 37 | 46029570 |
[2,3,4,7,8,15,28,65,87,134,271,272,577,578,1227, 1844,3695,4624,9825,18562,37127,37537,37538,75627, 113480,283799,283800,1198543,1201967,1302144, 3907583,3907584,11948189,13143019,13151298, 39453911,46029570] |