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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 6 |
| 6 | 0 |
| 7 | 6 |
| 8 | 32 |
| 9 | 32 |
| 10 | 6 |
| 11 | 20 |
| 12 | 520 |
| 13 | 892 |
| 14 | 520 |
| 15 | 20 |
| 16 | 20 |
| 17 | 4556 |
| 18 | 42492 |
| 19 | 42492 |
| 20 | 4556 |
| 21 | 20 |
| 22 | 70 |
| 23 | 57072 |
| 24 | 779875 |
| 25 | 3584673 |
| 26 | 779875 |
| 27 | 57072 |
| 28 | 70 |
| 29 | 685 |
| 30 | 594544 |
| 31 | 41383224 |
| 32 | 298478633 |
| 33 | 298478633 |
| 34 | 41383224 |
| 35 | 594544 |
| 36 | 685 |
| 37 | 2808 |
| 38 | 6958016 |
| 39 | 735555885 |
| 40 | 24650010932 |
[1,0,0,0,6,0,6,32,32,6,20,520,892,520,20,20,4556, 42492,42492,4556,20,70,57072,779875,3584673, 779875,57072,70,685,594544,41383224,298478633, 298478633,41383224,594544,685,2808,6958016, 735555885,24650010932] |