The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 5 |
| 3 | 11 |
| 4 | 29 |
| 5 | 67 |
| 6 | 149 |
| 7 | 347 |
| 8 | 813 |
| 9 | 1875 |
| 10 | 4325 |
| 11 | 10027 |
| 12 | 23229 |
| 13 | 53731 |
| 14 | 124341 |
| 15 | 287867 |
| 16 | 666317 |
| 17 | 1542131 |
| 18 | 3569413 |
| 19 | 8261963 |
| 20 | 19123037 |
| 21 | 44261763 |
| 22 | 102448341 |
| 23 | 237127067 |
| 24 | 548852845 |
| 25 | 1270371987 |
| 26 | 2940399397 |
| 27 | 6805838187 |
| 28 | 15752764925 |
| 29 | 36461289251 |
| 30 | 84393166325 |
| 31 | 195336103099 |
[1,3,5,11,29,67,149,347,813,1875,4325,10027,23229, 53731,124341,287867,666317,1542131,3569413, 8261963,19123037,44261763,102448341,237127067, 548852845,1270371987,2940399397,6805838187, 15752764925,36461289251,84393166325,195336103099] |