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 | 19 |
| 2 | 193 |
| 3 | 52489 |
| 4 | 114689 |
| 5 | 9000000001 |
| 6 | 259374246011 |
| 7 | 38280596832649217 |
| 8 | 59296646043258913 |
| 9 | 408700964355468751 |
| 10 | 2434970217729660813313 |
| 11 | 13576803638250229989377 |
| 12 | 21000000000000000000001 |
| 13 | 3140085798164163223281069127 |
| 14 | 4818833289797717549937328129 |