The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 9 |
| 4 | 17 |
| 5 | 33 |
| 6 | 59 |
| 7 | 109 |
| 8 | 201 |
| 9 | 369 |
| 10 | 679 |
| 11 | 1249 |
| 12 | 2297 |
| 13 | 4225 |
| 14 | 7771 |
| 15 | 14293 |
| 16 | 26289 |
| 17 | 48353 |
| 18 | 88935 |
| 19 | 163577 |
| 20 | 300865 |
| 21 | 553377 |
| 22 | 1017819 |
| 23 | 1872061 |
| 24 | 3443257 |
| 25 | 6333137 |
| 26 | 11648455 |
| 27 | 21424849 |
| 28 | 39406441 |
| 29 | 72479745 |
| 30 | 133311035 |
| 31 | 245197221 |
| 32 | 450988001 |
| 33 | 829496257 |
[1,7,9,17,33,59,109,201,369,679,1249,2297,4225, 7771,14293,26289,48353,88935,163577,300865,553377, 1017819,1872061,3443257,6333137,11648455,21424849, 39406441,72479745,133311035,245197221,450988001, 829496257] |