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 | 12 |
| 4 | 46 |
| 5 | 194 |
| 6 | 977 |
| 7 | 5492 |
| 8 | 33666 |
| 9 | 220068 |
| 10 | 1513371 |
| 11 | 10833076 |
| 12 | 80104927 |
| 13 | 608455060 |
| 14 | 4726881850 |
| 15 | 37431015268 |
| 16 | 301327263751 |
| 17 | 2460711566651 |
| 18 | 20348625806080 |
| 19 | 170149286304116 |
| 20 | 1436870802519360 |
| 21 | 12241980697771924 |
| 22 | 105136072207222852 |
| 23 | 909475787902559408 |
| 24 | 7919305232077304848 |