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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 3 |
| 10 | 2 |
| 11 | 0 |
| 12 | 1 |
| 13 | 6 |
| 14 | 10 |
| 15 | 5 |
| 16 | 1 |
| 17 | 10 |
| 18 | 30 |
| 19 | 35 |
| 20 | 15 |
| 21 | 15 |
| 22 | 70 |
| 23 | 140 |
| 24 | 127 |
| 25 | 63 |
| 26 | 140 |
| 27 | 420 |
| 28 | 631 |
| 29 | 490 |
| 30 | 384 |
| 31 | 1050 |
| 32 | 2311 |
| 33 | 2808 |
| 34 | 2136 |
| 35 | 2739 |
| 36 | 6931 |
| 37 | 12057 |
| 38 | 12672 |
| 39 | 11055 |
| 40 | 19449 |
| 41 | 42097 |
| 42 | 61050 |
| 43 | 60060 |
| 44 | 66353 |
| 45 | 131054 |
| 46 | 241670 |
| 47 | 306735 |
| 48 | 308881 |
| 49 | 428792 |
| 50 | 835614 |
| 51 | 1337765 |
[1,0,0,0,1,1,0,0,1,3,2,0,1,6,10,5,1,10,30,35,15, 15,70,140,127,63,140,420,631,490,384,1050,2311, 2808,2136,2739,6931,12057,12672,11055,19449,42097, 61050,60060,66353,131054,241670,306735,308881, 428792,835614,1337765] |