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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 9 |
| 2 | 35 |
| 3 | 139 |
| 4 | 549 |
| 5 | 2169 |
| 6 | 8571 |
| 7 | 33866 |
| 8 | 133817 |
| 9 | 528755 |
| 10 | 2089288 |
| 11 | 8255476 |
| 12 | 32620147 |
| 13 | 128893113 |
| 14 | 509299806 |
| 15 | 2012413902 |
| 16 | 7951720511 |
| 17 | 31419907712 |
| 18 | 124150565816 |
| 19 | 490560415825 |
| 20 | 1938368302977 |
| 21 | 7659141579267 |
| 22 | 30263830481105 |
| 23 | 119582517950630 |
| 24 | 472510530626342 |
[2,9,35,139,549,2169,8571,33866,133817,528755, 2089288,8255476,32620147,128893113,509299806, 2012413902,7951720511,31419907712,124150565816, 490560415825,1938368302977,7659141579267, 30263830481105,119582517950630,472510530626342] |