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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 6 |
| 3 | 1 |
| 4 | 15 |
| 5 | 6 |
| 6 | 42 |
| 7 | 16 |
| 8 | 24 |
| 9 | 30 |
| 10 | 44 |
| 11 | 6 |
| 12 | 1365 |
| 13 | 42 |
| 14 | 150 |
| 15 | 256 |
| 16 | 3855 |
| 17 | 72 |
| 18 | 74898 |
| 19 | 30 |
| 20 | 336 |
| 21 | 1364 |
| 22 | 44620 |
| 23 | 240 |
| 24 | 900 |
| 25 | 2730 |
| 26 | 262656 |
| 27 | 336 |
| 28 | 39672 |
| 29 | 1650 |
| 30 | 195225786 |
| 31 | 65536 |
| 32 | 1198956 |
| 33 | 131070 |
| 34 | 92190 |
| 35 | 216 |
| 36 | 616318176 |
| 37 | 524286 |
| 38 | 2123940 |
| 39 | 61680 |
| 40 | 26815350376 |
| 41 | 43344 |
[0,1,6,1,15,6,42,16,24,30,44,6,1365,42,150,256, 3855,72,74898,30,336,1364,44620,240,900,2730, 262656,336,39672,1650,195225786,65536,1198956, 131070,92190,216,616318176,524286,2123940,61680, 26815350376,43344] |