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 | 3 |
| 2 | 7 |
| 3 | 11 |
| 4 | 36 |
| 5 | 72 |
| 6 | 676 |
| 7 | 1287 |
| 8 | 2108 |
| 9 | 11512 |
| 10 | 21112 |
| 11 | 23927 |
| 12 | 35447 |
| 13 | 37112 |
| 14 | 41527 |
| 15 | 67323 |
| 16 | 35289847 |
| 17 | 41633847 |
| 18 | 11684368072 |
| 19 | 24026103588 |
| 20 | 364110500487 |
| 21 | 7566093164465563 |