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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 7 |
| 5 | 12 |
| 6 | 6 |
| 7 | 1 |
| 8 | 25 |
| 9 | 138 |
| 10 | 294 |
| 11 | 270 |
| 12 | 90 |
| 13 | 1 |
| 14 | 79 |
| 15 | 1056 |
| 16 | 5298 |
| 17 | 12780 |
| 18 | 16020 |
| 19 | 10080 |
| 20 | 2520 |
| 21 | 1 |
| 22 | 241 |
| 23 | 7050 |
| 24 | 70350 |
| 25 | 334710 |
| 26 | 875970 |
| 27 | 1335600 |
| 28 | 1184400 |
| 29 | 567000 |
| 30 | 113400 |
| 31 | 1 |
| 32 | 727 |
| 33 | 44472 |
| 34 | 817746 |
| 35 | 6849900 |
| 36 | 31500180 |
| 37 | 87348240 |
| 38 | 152643960 |
| 39 | 169533000 |
| 40 | 116235000 |
| 41 | 44906400 |
| 42 | 7484400 |
[1,1,1,7,12,6,1,25,138,294,270,90,1,79,1056,5298, 12780,16020,10080,2520,1,241,7050,70350,334710, 875970,1335600,1184400,567000,113400,1,727,44472, 817746,6849900,31500180,87348240,152643960, 169533000,116235000,44906400,7484400] |