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 | 4 |
| 3 | 14 |
| 4 | 49 |
| 5 | 177 |
| 6 | 650 |
| 7 | 2417 |
| 8 | 9071 |
| 9 | 34289 |
| 10 | 130360 |
| 11 | 497928 |
| 12 | 1909322 |
| 13 | 7345470 |
| 14 | 28338826 |
| 15 | 109597727 |
| 16 | 424761659 |
| 17 | 1649314553 |
| 18 | 6414825656 |
| 19 | 24986917292 |
| 20 | 97458970094 |
| 21 | 380589237038 |
| 22 | 1487882440676 |
| 23 | 5822592097682 |
| 24 | 22806739654454 |