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 | 11 |
| 2 | 114 |
| 3 | 1163 |
| 4 | 11806 |
| 5 | 119646 |
| 6 | 1211820 |
| 7 | 12271179 |
| 8 | 124251318 |
| 9 | 1258065866 |
| 10 | 12737997724 |
| 11 | 128972535582 |
| 12 | 1305848105836 |
| 13 | 13221716621852 |
| 14 | 133869898347264 |
| 15 | 1355432788629963 |
| 16 | 13723757247851046 |
| 17 | 138953043155444562 |
| 18 | 1406899565919247884 |
| 19 | 14244858120395937738 |
| 20 | 144229188529316725956 |