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| n | a(n) |
|---|---|
| 0 | -1 |
| 1 | -1 |
| 2 | -1 |
| 3 | -1 |
| 4 | -1 |
| 5 | -1 |
| 6 | -1 |
| 7 | 0 |
| 8 | 0 |
| 9 | -1 |
| 10 | -1 |
| 11 | 1 |
| 12 | 2 |
| 13 | 1 |
| 14 | -1 |
| 15 | -1 |
| 16 | 7 |
| 17 | 9 |
| 18 | 9 |
| 19 | 7 |
| 20 | -1 |
| 21 | -1 |
| 22 | 35 |
| 23 | 43 |
| 24 | 44 |
| 25 | 43 |
| 26 | 35 |
| 27 | -1 |
| 28 | -1 |
| 29 | 191 |
| 30 | 227 |
| 31 | 234 |
| 32 | 234 |
| 33 | 227 |
| 34 | 191 |
| 35 | -1 |
| 36 | -1 |
| 37 | 1199 |
| 38 | 1391 |
| 39 | 1426 |
| 40 | 1432 |
| 41 | 1426 |
| 42 | 1391 |
| 43 | 1199 |
| 44 | -1 |
| 45 | -1 |
| 46 | 10079 |
| 47 | 11279 |
| 48 | 11470 |
| 49 | 11504 |
| 50 | 11504 |
| 51 | 11470 |
| 52 | 11279 |
| 53 | 10079 |
| 54 | -1 |
[-1,-1,-1,-1,-1,-1,-1,0,0,-1,-1,1,2,1,-1,-1,7,9,9, 7,-1,-1,35,43,44,43,35,-1,-1,191,227,234,234,227, 191,-1,-1,1199,1391,1426,1432,1426,1391,1199,-1, -1,10079,11279,11470,11504,11504,11470,11279, 10079,-1] |