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| n | a(n) |
|---|---|
| 1 | 186 |
| 2 | 608 |
| 3 | 2086 |
| 4 | 7742 |
| 5 | 29278 |
| 6 | 113666 |
| 7 | 446590 |
| 8 | 1777146 |
| 9 | 7128062 |
| 10 | 28800050 |
| 11 | 116956694 |
| 12 | 477079450 |
| 13 | 1952467246 |
| 14 | 8013263810 |
| 15 | 32960180670 |
| 16 | 135831293266 |
| 17 | 560640193430 |
| 18 | 2317207177362 |
| 19 | 9588529183750 |
| 20 | 39718769341930 |
| 21 | 164680552349318 |
[186,608,2086,7742,29278,113666,446590,1777146, 7128062,28800050,116956694,477079450,1952467246, 8013263810,32960180670,135831293266,560640193430, 2317207177362,9588529183750,39718769341930, 164680552349318] |