This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 25 |
| 3 | 125 |
| 4 | 625 |
| 5 | 3125 |
| 6 | 15625 |
| 7 | 78005 |
| 8 | 384550 |
| 9 | 1829850 |
| 10 | 8209410 |
| 11 | 34219650 |
| 12 | 131875900 |
| 13 | 470597480 |
| 14 | 1562441800 |
| 15 | 4855374080 |
| 16 | 14208711350 |
| 17 | 39381411950 |
| 18 | 103917328350 |
| 19 | 262270328730 |
| 20 | 635683810740 |
| 21 | 1484963848500 |
| 22 | 3353799866500 |