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 | 25 |
| 2 | 625 |
| 3 | 2815 |
| 4 | 12567 |
| 5 | 46199 |
| 6 | 185613 |
| 7 | 786907 |
| 8 | 3121285 |
| 9 | 12547290 |
| 10 | 51431686 |
| 11 | 207462822 |
| 12 | 837211531 |
| 13 | 3399092159 |
| 14 | 13752531706 |
| 15 | 55605190507 |
| 16 | 225211225477 |
| 17 | 911554639912 |
| 18 | 3688266309172 |
| 19 | 14929725196351 |
| 20 | 60428546476595 |