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 | 11 |
| 2 | 32 |
| 3 | 84 |
| 4 | 209 |
| 5 | 511 |
| 6 | 1240 |
| 7 | 3000 |
| 8 | 7249 |
| 9 | 17507 |
| 10 | 42272 |
| 11 | 102060 |
| 12 | 246401 |
| 13 | 594871 |
| 14 | 1436152 |
| 15 | 3467184 |
| 16 | 8370529 |
| 17 | 20208251 |
| 18 | 48787040 |
| 19 | 117782340 |
| 20 | 284351729 |
| 21 | 686485807 |
| 22 | 1657323352 |
| 23 | 4001132520 |
| 24 | 9659588401 |
| 25 | 23320309331 |
| 26 | 56300207072 |
| 27 | 135920723484 |
| 28 | 328141654049 |