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 | 8 |
| 2 | 6 |
| 3 | 7 |
| 4 | 20 |
| 5 | 30 |
| 6 | 76 |
| 7 | 217 |
| 8 | 509 |
| 9 | 1189 |
| 10 | 3034 |
| 11 | 7569 |
| 12 | 18274 |
| 13 | 44932 |
| 14 | 111561 |
| 15 | 274057 |
| 16 | 672217 |
| 17 | 1657278 |
| 18 | 4083105 |
| 19 | 10038822 |
| 20 | 24702412 |
| 21 | 60827449 |
| 22 | 149699125 |
| 23 | 368356029 |
| 24 | 906653234 |
| 25 | 2231584641 |
| 26 | 5492001706 |
| 27 | 13516457764 |
| 28 | 33267138281 |
| 29 | 81875898241 |