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) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 35 |
| 3 | 83 |
| 4 | 183 |
| 5 | 391 |
| 6 | 823 |
| 7 | 1719 |
| 8 | 3575 |
| 9 | 7415 |
| 10 | 15351 |
| 11 | 31735 |
| 12 | 65527 |
| 13 | 135159 |
| 14 | 278519 |
| 15 | 573431 |
| 16 | 1179639 |
| 17 | 2424823 |
| 18 | 4980727 |
| 19 | 10223607 |
| 20 | 20971511 |
| 21 | 42991607 |
| 22 | 88080375 |
| 23 | 180355063 |
| 24 | 369098743 |
| 25 | 754974711 |
| 26 | 1543503863 |
| 27 | 3154116599 |
| 28 | 6442450935 |
| 29 | 13153337335 |
| 30 | 26843545591 |