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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | 0 |
| 28 | 0 |
| 29 | 0 |
| 30 | 0 |
| 31 | 0 |
| 32 | 0 |
| 33 | 0 |
| 34 | 0 |
| 35 | 4 |
| 36 | 36 |
| 37 | 188 |
| 38 | 776 |
| 39 | 2814 |
| 40 | 9312 |
| 41 | 28827 |
| 42 | 84895 |
| 43 | 240293 |
| 44 | 658666 |
| 45 | 1758256 |
| 46 | 4589563 |
| 47 | 11751829 |
| 48 | 29590320 |
| 49 | 73406600 |
| 50 | 179689401 |
| 51 | 434552068 |
| 52 | 1039254265 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,4,36,188,776,2814,9312,28827, 84895,240293,658666,1758256,4589563,11751829, 29590320,73406600,179689401,434552068,1039254265] |