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 | 2 |
| 3 | 3 |
| 4 | 23 |
| 5 | 48 |
| 6 | 71 |
| 7 | 1766 |
| 8 | 1837 |
| 9 | 2387 |
| 10 | 3103 |
| 11 | 3152 |
| 12 | 10963 |
| 13 | 26353 |
| 14 | 53533 |
| 15 | 101626 |
| 16 | 122825 |
| 17 | 258586 |
| 18 | 331933 |
| 19 | 590519 |
| 20 | 920650 |