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 | 5 |
| 3 | 7 |
| 4 | 22 |
| 5 | 39 |
| 6 | 84 |
| 7 | 173 |
| 8 | 367 |
| 9 | 716 |
| 10 | 1444 |
| 11 | 2945 |
| 12 | 5823 |
| 13 | 11817 |
| 14 | 23457 |
| 15 | 47117 |
| 16 | 94496 |
| 17 | 188670 |
| 18 | 378296 |
| 19 | 755437 |
| 20 | 1512435 |
| 21 | 3024742 |
| 22 | 6049260 |
| 23 | 12099777 |
| 24 | 24205776 |
| 25 | 48402649 |
| 26 | 96809896 |
| 27 | 193632363 |
| 28 | 387252738 |
| 29 | 774544273 |
| 30 | 1549044943 |