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 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 7 |
| 5 | 19 |
| 6 | 23 |
| 7 | 67 |
| 8 | 107 |
| 9 | 400 |
| 10 | 429 |
| 11 | 617 |
| 12 | 743 |
| 13 | 1065 |
| 14 | 7717 |
| 15 | 12329 |
| 16 | 14459 |
| 17 | 22425 |
| 18 | 114543 |
| 19 | 221983 |
| 20 | 237453 |