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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 17 |
| 3 | 65 |
| 4 | 241 |
| 5 | 917 |
| 6 | 3473 |
| 7 | 13145 |
| 8 | 50593 |
| 9 | 198689 |
| 10 | 779069 |
| 11 | 3087701 |
| 12 | 12314561 |
| 13 | 49200165 |
| 14 | 196648533 |
| 15 | 785726841 |
[1,5,17,65,241,917,3473,13145,50593,198689,779069, 3087701,12314561,49200165,196648533,785726841] |