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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 16 |
| 3 | 187 |
| 4 | 245 |
| 5 | 1326 |
| 6 | 22025 |
| 7 | 217076 |
| 8 | 2214752 |
| 9 | 25047853 |
| 10 | 282144055 |
| 11 | 694855331 |
[4,16,187,245,1326,22025,217076,2214752,25047853, 282144055,694855331] |