The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 4 |
| 3 | 8 |
| 4 | 14 |
| 5 | 28 |
| 6 | 46 |
| 7 | 90 |
| 8 | 160 |
| 9 | 308 |
| 10 | 540 |
| 11 | 1032 |
| 12 | 1846 |
| 13 | 3502 |
| 14 | 6272 |
| 15 | 11852 |
| 16 | 21364 |
| 17 | 40234 |
| 18 | 72694 |
| 19 | 136564 |
| 20 | 247498 |
| 21 | 464070 |
| 22 | 842546 |
| 23 | 1577280 |
| 24 | 2868922 |
| 25 | 5364030 |
| 26 | 9769366 |
| 27 | 18245976 |
| 28 | 33272104 |
| 29 | 62086194 |
| 30 | 113326264 |
| 31 | 211304042 |
| 32 | 386039204 |
| 33 | 719319094 |
| 34 | 1315132086 |
| 35 | 2449100566 |
[3,4,8,14,28,46,90,160,308,540,1032,1846,3502, 6272,11852,21364,40234,72694,136564,247498,464070, 842546,1577280,2868922,5364030,9769366,18245976, 33272104,62086194,113326264,211304042,386039204, 719319094,1315132086,2449100566] |