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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 181 |
| 3 | 0 |
| 4 | 6095 |
| 5 | 0 |
| 6 | 63121 |
| 7 | 0 |
| 8 | 364051 |
| 9 | 0 |
| 10 | 1478059 |
| 11 | 0 |
| 12 | 4749875 |
| 13 | 0 |
| 14 | 12917383 |
| 15 | 0 |
| 16 | 30996867 |
| 17 | 0 |
| 18 | 67483509 |
| 19 | 0 |
| 20 | 135917019 |
| 21 | 0 |
| 22 | 256859575 |
| 23 | 0 |
| 24 | 460336079 |
| 25 | 0 |
| 26 | 788783775 |
| 27 | 0 |
| 28 | 1300561813 |
| 29 | 0 |
| 30 | 2074066679 |
| 31 | 0 |
| 32 | 3212505371 |
| 33 | 0 |
| 34 | 4849371247 |
| 35 | 0 |
| 36 | 7154674999 |
| 37 | 0 |
| 38 | 10341975199 |
| 39 | 0 |
[0,181,0,6095,0,63121,0,364051,0,1478059,0, 4749875,0,12917383,0,30996867,0,67483509,0, 135917019,0,256859575,0,460336079,0,788783775,0, 1300561813,0,2074066679,0,3212505371,0,4849371247, 0,7154674999,0,10341975199,0] |