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 | 5 |
| 2 | 53 |
| 3 | 173 |
| 4 | 293 |
| 5 | 2477 |
| 6 | 9173 |
| 7 | 61613 |
| 8 | 74093 |
| 9 | 170957 |
| 10 | 360293 |
| 11 | 679733 |
| 12 | 2004917 |
| 13 | 69009533 |
| 14 | 138473837 |
| 15 | 237536213 |
| 16 | 384479933 |
| 17 | 883597853 |
| 18 | 1728061733 |
| 19 | 9447241877 |
| 20 | 49107823133 |
| 21 | 1843103135837 |
| 22 | 4316096218013 |
| 23 | 15021875771117 |
| 24 | 82409880589277 |
| 25 | 326813126363093 |
| 26 | 390894884910197 |
| 27 | 1051212848890277 |