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 | 625 |
| 2 | 637 |
| 3 | 658 |
| 4 | 700 |
| 5 | 778 |
| 6 | 934 |
| 7 | 1234 |
| 8 | 1834 |
| 9 | 3010 |
| 10 | 5362 |
| 11 | 10018 |
| 12 | 19330 |
| 13 | 37858 |
| 14 | 74914 |
| 15 | 148834 |
| 16 | 296674 |
| 17 | 591970 |
| 18 | 1182562 |
| 19 | 2362978 |
| 20 | 4723810 |
| 21 | 9443938 |
| 22 | 18884194 |
| 23 | 37761634 |
| 24 | 75516514 |
| 25 | 151020130 |
| 26 | 302027362 |
| 27 | 604029538 |
| 28 | 1208033890 |
| 29 | 2416018018 |
| 30 | 4831986274 |