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| n | a(n) |
|---|---|
| 2 | 6 |
| 3 | 0 |
| 4 | 30 |
| 5 | 60 |
| 6 | 0 |
| 7 | 84 |
| 8 | 0 |
| 9 | 210 |
| 10 | 0 |
| 11 | 180 |
| 12 | 210 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 330 |
| 17 | 0 |
| 18 | 630 |
| 19 | 0 |
| 20 | 924 |
| 21 | 0 |
| 22 | 546 |
| 23 | 504 |
| 24 | 0 |
| 25 | 1320 |
| 26 | 0 |
| 27 | 1560 |
| 28 | 0 |
| 29 | 840 |
| 30 | 0 |
| 31 | 1386 |
| 32 | 0 |
| 33 | 2340 |
| 34 | 0 |
| 35 | 0 |
| 36 | 0 |
| 37 | 1224 |
| 38 | 990 |
| 39 | 0 |
| 40 | 2730 |
| 41 | 0 |
| 42 | 0 |
| 43 | 0 |
| 44 | 3570 |
| 45 | 0 |
| 46 | 1710 |
| 47 | 0 |
| 48 | 2574 |
| 49 | 0 |
| 50 | 4620 |
| 51 | 0 |
| 52 | 5610 |
| 53 | 0 |
| 54 | 5016 |
| 55 | 0 |
| 56 | 2310 |
| 57 | 1716 |
| 58 | 0 |
| 59 | 0 |
| 60 | 0 |
| 61 | 7140 |
| 62 | 0 |
| 63 | 7980 |
| 64 | 0 |
| 65 | 0 |
| 66 | 0 |
| 67 | 3036 |
[6,0,30,60,0,84,0,210,0,180,210,0,0,0,330,0,630,0, 924,0,546,504,0,1320,0,1560,0,840,0,1386,0,2340,0, 0,0,1224,990,0,2730,0,0,0,3570,0,1710,0,2574,0, 4620,0,5610,0,5016,0,2310,1716,0,0,0,7140,0,7980, 0,0,0,3036] |