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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 38 |
| 4 | 175 |
| 5 | 817 |
| 6 | 3888 |
| 7 | 18706 |
| 8 | 90741 |
| 9 | 442632 |
| 10 | 2169338 |
| 11 | 10666288 |
| 12 | 52587182 |
| 13 | 259821034 |
| 14 | 1285891645 |
| 15 | 6373073347 |
| 16 | 31622486634 |
| 17 | 157058315801 |
| 18 | 780692584245 |
| 19 | 3883263652957 |
| 20 | 19327173594696 |
| 21 | 96240654982101 |
| 22 | 479443040395988 |
| 23 | 2389346456179473 |
| 24 | 11911428087996838 |
| 25 | 59398206424878578 |
| 26 | 296273414137107748 |
[1,2,9,38,175,817,3888,18706,90741,442632,2169338, 10666288,52587182,259821034,1285891645,6373073347, 31622486634,157058315801,780692584245, 3883263652957,19327173594696,96240654982101, 479443040395988,2389346456179473, 11911428087996838,59398206424878578, 296273414137107748] |