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 | 19 |
| 3 | 37 |
| 4 | 455 |
| 5 | 509 |
| 6 | 575 |
| 7 | 20597 |
| 8 | 202717 |
| 9 | 1864637 |
| 10 | 542474231 |
| 11 | 1139733677 |
| 12 | 51283502951 |
| 13 | 230026580777 |
| 14 | 22148897608321 |
| 15 | 51271840444039 |
| 16 | 1820988137264459 |