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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 88 |
| 5 | 525 |
| 6 | 414 |
| 7 | 525 |
| 8 | 656 |
| 9 | 747 |
| 10 | 0 |
| 11 | 242 |
| 12 | 6996 |
| 13 | 7007 |
| 14 | 20202 |
| 15 | 52425 |
| 16 | 25952 |
| 17 | 20502 |
| 18 | 28782 |
| 19 | 28082 |
| 20 | 0 |
| 21 | 32823 |
| 22 | 4334 |
| 23 | 40204 |
| 24 | 61416 |
| 25 | 520025 |
| 26 | 64246 |
| 27 | 73737 |
| 28 | 69496 |
| 29 | 76067 |
| 30 | 0 |
| 31 | 95759 |
| 32 | 276672 |
| 33 | 9339 |
| 34 | 272272 |
| 35 | 5046405 |
| 36 | 468864 |
| 37 | 36963 |
| 38 | 611116 |
| 39 | 333333 |
| 40 | 0 |
[1,4,9,88,525,414,525,656,747,0,242,6996,7007, 20202,52425,25952,20502,28782,28082,0,32823,4334, 40204,61416,520025,64246,73737,69496,76067,0, 95759,276672,9339,272272,5046405,468864,36963, 611116,333333,0] |