The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 14 |
| 5 | 34 |
| 6 | 74 |
| 7 | 154 |
| 8 | 304 |
| 9 | 580 |
| 10 | 1066 |
| 11 | 1901 |
| 12 | 3304 |
| 13 | 5610 |
| 14 | 9332 |
| 15 | 15241 |
| 16 | 24476 |
| 17 | 38721 |
| 18 | 60418 |
| 19 | 93088 |
| 20 | 141765 |
| 21 | 213590 |
| 22 | 318608 |
| 23 | 470873 |
| 24 | 689907 |
| 25 | 1002660 |
| 26 | 1446141 |
| 27 | 2070897 |
| 28 | 2945590 |
| 29 | 4163079 |
| 30 | 5848345 |
| 31 | 8168863 |
| 32 | 11348145 |
| 33 | 15683285 |
| 34 | 21567664 |
| 35 | 29520301 |
[1,2,6,14,34,74,154,304,580,1066,1901,3304,5610, 9332,15241,24476,38721,60418,93088,141765,213590, 318608,470873,689907,1002660,1446141,2070897, 2945590,4163079,5848345,8168863,11348145,15683285, 21567664,29520301] |