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) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 12 |
| 4 | 32 |
| 5 | 82 |
| 6 | 205 |
| 7 | 508 |
| 8 | 1258 |
| 9 | 3129 |
| 10 | 7837 |
| 11 | 19782 |
| 12 | 50310 |
| 13 | 128803 |
| 14 | 331592 |
| 15 | 857434 |
| 16 | 2224726 |
| 17 | 5787130 |
| 18 | 15082283 |
| 19 | 39360630 |
| 20 | 102820286 |
| 21 | 268777679 |
| 22 | 702935723 |
| 23 | 1839002254 |
| 24 | 4812250428 |
| 25 | 12594535285 |
| 26 | 32965703404 |
| 27 | 86292668280 |
| 28 | 225894991484 |