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 | 2 |
| 2 | 5 |
| 3 | 11 |
| 4 | 26 |
| 5 | 60 |
| 6 | 145 |
| 7 | 353 |
| 8 | 884 |
| 9 | 2241 |
| 10 | 5786 |
| 11 | 15108 |
| 12 | 39941 |
| 13 | 106558 |
| 14 | 286809 |
| 15 | 777505 |
| 16 | 2121668 |
| 17 | 5822287 |
| 18 | 16059288 |
| 19 | 44494738 |
| 20 | 123782207 |
| 21 | 345615047 |
| 22 | 968211110 |
| 23 | 2720561790 |
| 24 | 7665640267 |
| 25 | 21654105734 |
| 26 | 61312389677 |
| 27 | 173978404587 |
| 28 | 494667697706 |
| 29 | 1409099662020 |