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 | 3 |
| 3 | 5 |
| 4 | 11 |
| 5 | 23 |
| 6 | 51 |
| 7 | 113 |
| 8 | 255 |
| 9 | 579 |
| 10 | 1325 |
| 11 | 3047 |
| 12 | 7039 |
| 13 | 16319 |
| 14 | 37951 |
| 15 | 88489 |
| 16 | 206799 |
| 17 | 484255 |
| 18 | 1135969 |
| 19 | 2668951 |
| 20 | 6279509 |
| 21 | 14793169 |
| 22 | 34889553 |
| 23 | 82372723 |
| 24 | 194664283 |
| 25 | 460436551 |
| 26 | 1089943229 |
| 27 | 2582033519 |
| 28 | 6120967411 |
| 29 | 14519686915 |
| 30 | 34463104999 |