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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 163 |
| 3 | 841 |
| 4 | 5083 |
| 5 | 31095 |
| 6 | 194959 |
| 7 | 1238423 |
| 8 | 7951387 |
| 9 | 51466531 |
| 10 | 335298133 |
| 11 | 2196036109 |
| 12 | 14446557007 |
| 13 | 95391055551 |
| 14 | 631880846109 |
| 15 | 4197195979281 |
| 16 | 27946473646107 |
| 17 | 186471447915971 |
| 18 | 1246550326511095 |
| 19 | 8346999521414075 |
[1,25,163,841,5083,31095,194959,1238423,7951387, 51466531,335298133,2196036109,14446557007, 95391055551,631880846109,4197195979281, 27946473646107,186471447915971,1246550326511095, 8346999521414075] |