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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 41 |
| 3 | 185 |
| 4 | 761 |
| 5 | 3089 |
| 6 | 12385 |
| 7 | 49537 |
| 8 | 197785 |
| 9 | 789721 |
| 10 | 3154305 |
| 11 | 12604401 |
| 12 | 50383849 |
| 13 | 201450633 |
| 14 | 805595985 |
| 15 | 3221892385 |
[1,5,41,185,761,3089,12385,49537,197785,789721, 3154305,12604401,50383849,201450633,805595985, 3221892385] |