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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 6 |
| 6 | 0 |
| 7 | 6 |
| 8 | 24 |
| 9 | 16 |
| 10 | 0 |
| 11 | 16 |
| 12 | 225 |
| 13 | 546 |
| 14 | 280 |
| 15 | 0 |
| 16 | 16 |
| 17 | 1456 |
| 18 | 12330 |
| 19 | 13416 |
| 20 | 1440 |
| 21 | 0 |
| 22 | 40 |
| 23 | 11874 |
| 24 | 198848 |
| 25 | 737254 |
| 26 | 255216 |
| 27 | 16352 |
| 28 | 0 |
| 29 | 280 |
| 30 | 86726 |
| 31 | 5010580 |
| 32 | 40395409 |
| 33 | 45578462 |
| 34 | 6939648 |
| 35 | 111104 |
| 36 | 0 |
| 37 | 768 |
| 38 | 681306 |
| 39 | 82588214 |
| 40 | 2222762597 |
| 41 | 5423134897 |
| 42 | 2870336499 |
[1,0,0,0,6,0,6,24,16,0,16,225,546,280,0,16,1456, 12330,13416,1440,0,40,11874,198848,737254,255216, 16352,0,280,86726,5010580,40395409,45578462, 6939648,111104,0,768,681306,82588214,2222762597, 5423134897,2870336499] |