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| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 7921 |
| 3 | 9604 |
| 4 | 164836 |
| 5 | 351649 |
| 6 | 996004 |
| 7 | 19758025 |
| 8 | 20647936 |
| 9 | 29757025 |
| 10 | 30846916 |
| 11 | 97990201 |
| 12 | 99960004 |
| 13 | 1203187969 |
| 14 | 1975180249 |
| 15 | 3086469136 |
| 16 | 4265657344 |
| 17 | 8143618564 |
| 18 | 9999600004 |
| 19 | 115644884356 |
| 20 | 131504868496 |
| 21 | 132231867769 |
| 22 | 140039859961 |
| 23 | 173879826121 |
| 24 | 339900660100 |
| 25 | 391600608400 |
[64,7921,9604,164836,351649,996004,19758025, 20647936,29757025,30846916,97990201,99960004, 1203187969,1975180249,3086469136,4265657344, 8143618564,9999600004,115644884356,131504868496, 132231867769,140039859961,173879826121, 339900660100,391600608400] |