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 | 3 |
| 2 | 26 |
| 3 | 83 |
| 4 | 173 |
| 5 | 1983 |
| 6 | 2953 |
| 7 | 19753 |
| 8 | 90643 |
| 9 | 258999 |
| 10 | 426859 |
| 11 | 4255753 |
| 12 | 13955253 |
| 13 | 42111153 |
| 14 | 92356426 |
| 15 | 425851173 |
| 16 | 878398753 |
| 17 | 9197190176 |
| 18 | 9196397753 |
| 19 | 89494606688 |
| 20 | 390974932563 |
| 21 | 918856391641 |
| 22 | 4250703842293 |