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 | 2 |
| 2 | 3 |
| 3 | 13 |
| 4 | 31 |
| 5 | 89 |
| 6 | 239 |
| 7 | 617 |
| 8 | 1571 |
| 9 | 4007 |
| 10 | 10141 |
| 11 | 25673 |
| 12 | 64853 |
| 13 | 163367 |
| 14 | 412007 |
| 15 | 1037759 |
| 16 | 2614369 |
| 17 | 6584857 |
| 18 | 16585291 |
| 19 | 41764859 |
| 20 | 105178831 |
| 21 | 264877933 |
| 22 | 667038311 |
| 23 | 1679809291 |
| 24 | 4230219377 |
| 25 | 10652786759 |
| 26 | 26826453991 |
| 27 | 67555877849 |