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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 0 |
| 5 | 20 |
| 6 | 12 |
| 7 | 42 |
| 8 | 0 |
| 9 | 0 |
| 10 | 40 |
| 11 | 110 |
| 12 | 0 |
| 13 | 156 |
| 14 | 84 |
| 15 | 120 |
| 16 | 0 |
| 17 | 272 |
| 18 | 0 |
| 19 | 342 |
| 20 | 0 |
| 21 | 252 |
| 22 | 220 |
| 23 | 506 |
| 24 | 0 |
| 25 | 0 |
| 26 | 312 |
| 27 | 0 |
| 28 | 0 |
| 29 | 812 |
| 30 | 240 |
| 31 | 930 |
| 32 | 0 |
| 33 | 660 |
| 34 | 544 |
| 35 | 840 |
| 36 | 0 |
| 37 | 1332 |
| 38 | 684 |
| 39 | 936 |
| 40 | 0 |
| 41 | 1640 |
| 42 | 504 |
| 43 | 1806 |
| 44 | 0 |
| 45 | 0 |
| 46 | 1012 |
| 47 | 2162 |
| 48 | 0 |
| 49 | 0 |
| 50 | 0 |
| 51 | 1632 |
| 52 | 0 |
| 53 | 2756 |
| 54 | 0 |
| 55 | 2200 |
| 56 | 0 |
| 57 | 2052 |
| 58 | 1624 |
| 59 | 3422 |
[1,2,6,0,20,12,42,0,0,40,110,0,156,84,120,0,272,0, 342,0,252,220,506,0,0,312,0,0,812,240,930,0,660, 544,840,0,1332,684,936,0,1640,504,1806,0,0,1012, 2162,0,0,0,1632,0,2756,0,2200,0,2052,1624,3422] |