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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 2 |
| 4 | 0 |
| 5 | 3 |
| 6 | 9 |
| 7 | 0 |
| 8 | 4 |
| 9 | 40 |
| 10 | 64 |
| 11 | 0 |
| 12 | 5 |
| 13 | 205 |
| 14 | 505 |
| 15 | 625 |
| 16 | 0 |
| 17 | 6 |
| 18 | 1176 |
| 19 | 4536 |
| 20 | 7056 |
| 21 | 7776 |
| 22 | 0 |
| 23 | 7 |
| 24 | 7399 |
| 25 | 46249 |
| 26 | 89929 |
| 27 | 112609 |
| 28 | 117649 |
| 29 | 0 |
| 30 | 8 |
| 31 | 50576 |
| 32 | 526352 |
| 33 | 1284032 |
| 34 | 1835072 |
| 35 | 2056832 |
| 36 | 2097152 |
| 37 | 0 |
| 38 | 9 |
| 39 | 372537 |
| 40 | 6604497 |
| 41 | 20351601 |
| 42 | 33188481 |
| 43 | 40325121 |
| 44 | 42683841 |
| 45 | 43046721 |
[1,0,2,0,3,9,0,4,40,64,0,5,205,505,625,0,6,1176, 4536,7056,7776,0,7,7399,46249,89929,112609,117649, 0,8,50576,526352,1284032,1835072,2056832,2097152, 0,9,372537,6604497,20351601,33188481,40325121, 42683841,43046721] |