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 | 12 |
| 4 | 28 |
| 5 | 65 |
| 6 | 149 |
| 7 | 341 |
| 8 | 777 |
| 9 | 1769 |
| 10 | 4022 |
| 11 | 9140 |
| 12 | 20763 |
| 13 | 47156 |
| 14 | 107086 |
| 15 | 243162 |
| 16 | 552128 |
| 17 | 1253640 |
| 18 | 2846424 |
| 19 | 6462827 |
| 20 | 14673824 |
| 21 | 33316766 |
| 22 | 75645245 |
| 23 | 171751292 |
| 24 | 389958283 |
| 25 | 885393129 |
| 26 | 2010268490 |