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 | 2 |
| 1 | 5 |
| 2 | 11 |
| 3 | 37 |
| 4 | 101 |
| 5 | 307 |
| 6 | 967 |
| 7 | 3023 |
| 8 | 9491 |
| 9 | 29819 |
| 10 | 93683 |
| 11 | 294211 |
| 12 | 924281 |
| 13 | 2903689 |
| 14 | 9122207 |
| 15 | 28658153 |
| 16 | 90032231 |
| 17 | 282844571 |
| 18 | 888582407 |
| 19 | 2791563953 |
| 20 | 8769956803 |
| 21 | 27551631847 |
| 22 | 86556004201 |
| 23 | 271923706939 |
| 24 | 854273519929 |
| 25 | 2683779414353 |
| 26 | 8431341691901 |
| 27 | 26487841119121 |