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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 | 1 |
| 34 | 7 |
| 35 | 41 |
| 36 | 163 |
| 37 | 585 |
| 38 | 1918 |
| 39 | 5930 |
| 40 | 17416 |
| 41 | 49521 |
| 42 | 136412 |
| 43 | 367153 |
| 44 | 967633 |
| 45 | 2506111 |
| 46 | 6388302 |
| 47 | 16060720 |
| 48 | 39862635 |
| 49 | 97793255 |
| 50 | 237305268 |
| 51 | 570010172 |
| 52 | 1356005205 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,1,7,41,163,585,1918,5930,17416, 49521,136412,367153,967633,2506111,6388302, 16060720,39862635,97793255,237305268,570010172, 1356005205] |