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| n | a(n) |
|---|---|
| 0 | -1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 2 |
| 7 | 12 |
| 8 | 15 |
| 9 | 20 |
| 10 | 6 |
| 11 | 30 |
| 12 | 35 |
| 13 | 42 |
| 14 | 12 |
| 15 | 56 |
| 16 | 63 |
| 17 | 72 |
| 18 | 20 |
| 19 | 90 |
| 20 | 99 |
| 21 | 110 |
| 22 | 30 |
| 23 | 132 |
| 24 | 143 |
| 25 | 156 |
| 26 | 42 |
| 27 | 182 |
| 28 | 195 |
| 29 | 210 |
| 30 | 56 |
| 31 | 240 |
| 32 | 255 |
| 33 | 272 |
| 34 | 72 |
| 35 | 306 |
| 36 | 323 |
| 37 | 342 |
| 38 | 90 |
| 39 | 380 |
| 40 | 399 |
| 41 | 420 |
| 42 | 110 |
| 43 | 462 |
| 44 | 483 |
| 45 | 506 |
| 46 | 132 |
| 47 | 552 |
| 48 | 575 |
| 49 | 600 |
| 50 | 156 |
[-1,0,0,2,3,6,2,12,15,20,6,30,35,42,12,56,63,72, 20,90,99,110,30,132,143,156,42,182,195,210,56,240, 255,272,72,306,323,342,90,380,399,420,110,462,483, 506,132,552,575,600,156] |