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 | 1 |
| 2 | 25 |
| 3 | 821 |
| 4 | 8361 |
| 5 | 57625 |
| 6 | 336617 |
| 7 | 1817149 |
| 8 | 9433849 |
| 9 | 48036737 |
| 10 | 242284857 |
| 11 | 1216409221 |
| 12 | 6093687497 |
| 13 | 30495285865 |
| 14 | 152537717449 |
| 15 | 762827288141 |
| 16 | 3814448005209 |
| 17 | 19072935346513 |
| 18 | 95366219539097 |
| 19 | 476834503269013 |