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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 25 |
| 3 | 100 |
| 4 | 1089 |
| 5 | 6724 |
| 6 | 56644 |
| 7 | 400689 |
| 8 | 3122289 |
| 9 | 23049601 |
| 10 | 175350564 |
| 11 | 1311815961 |
| 12 | 9905822784 |
| 13 | 74413292944 |
| 14 | 560619075025 |
| 15 | 4216817073121 |
| 16 | 31746204178129 |
| 17 | 238880949939076 |
| 18 | 1798010762343849 |
| 19 | 13531178521076836 |
| 20 | 101839561889056996 |
| 21 | 766437062965271569 |
[1,25,100,1089,6724,56644,400689,3122289,23049601, 175350564,1311815961,9905822784,74413292944, 560619075025,4216817073121,31746204178129, 238880949939076,1798010762343849, 13531178521076836,101839561889056996, 766437062965271569] |