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 | 1 |
| 2 | 4 |
| 3 | 11 |
| 4 | 27 |
| 5 | 64 |
| 6 | 156 |
| 7 | 345 |
| 8 | 779 |
| 9 | 1706 |
| 10 | 3665 |
| 11 | 7742 |
| 12 | 16207 |
| 13 | 33300 |
| 14 | 67830 |
| 15 | 136526 |
| 16 | 271969 |
| 17 | 536588 |
| 18 | 1049801 |
| 19 | 2035620 |
| 20 | 3917547 |
| 21 | 7482738 |
| 22 | 14192358 |
| 23 | 26738962 |
| 24 | 50062081 |
| 25 | 93158467 |
| 26 | 172366532 |
| 27 | 317166618 |
| 28 | 580542738 |
| 29 | 1057269629 |
| 30 | 1916174666 |