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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 1 |
| 6 | 9 |
| 7 | 7 |
| 8 | 25 |
| 9 | 25 |
| 10 | 83 |
| 11 | 85 |
| 12 | 277 |
| 13 | 327 |
| 14 | 965 |
| 15 | 1267 |
| 16 | 3479 |
| 17 | 4933 |
| 18 | 12713 |
| 19 | 19267 |
| 20 | 47079 |
| 21 | 75269 |
| 22 | 176317 |
| 23 | 294185 |
| 24 | 665893 |
| 25 | 1149735 |
| 26 | 2531711 |
| 27 | 4492395 |
| 28 | 9677791 |
| 29 | 17552673 |
| 30 | 37160277 |
| 31 | 68590367 |
| 32 | 143219187 |
| 33 | 268096983 |
| 34 | 553710855 |
| 35 | 1048276003 |
| 36 | 2146430287 |
[0,1,1,3,1,9,7,25,25,83,85,277,327,965,1267,3479, 4933,12713,19267,47079,75269,176317,294185,665893, 1149735,2531711,4492395,9677791,17552673,37160277, 68590367,143219187,268096983,553710855,1048276003, 2146430287] |