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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 561 |
| 3 | 1105 |
| 4 | 1729 |
| 5 | 0 |
| 6 | 29341 |
| 7 | 162401 |
| 8 | 334153 |
| 9 | 1615681 |
| 10 | 3581761 |
| 11 | 399001 |
| 12 | 294409 |
| 13 | 252601 |
| 14 | 1152271 |
| 15 | 104569501 |
| 16 | 2508013 |
| 17 | 178837201 |
| 18 | 6189121 |
| 19 | 10267951 |
| 20 | 10024561 |
| 21 | 14469841 |
| 22 | 4461725581 |
| 23 | 985052881 |
| 24 | 19384289 |
| 25 | 23382529 |
| 26 | 3828001 |
| 27 | 90698401 |
[0,561,1105,1729,0,29341,162401,334153,1615681, 3581761,399001,294409,252601,1152271,104569501, 2508013,178837201,6189121,10267951,10024561, 14469841,4461725581,985052881,19384289,23382529, 3828001,90698401] |