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 | 4 |
| 4 | 10 |
| 5 | 19 |
| 6 | 30 |
| 7 | 45 |
| 8 | 61 |
| 9 | 84 |
| 10 | 106 |
| 11 | 134 |
| 12 | 165 |
| 13 | 199 |
| 14 | 234 |
| 15 | 277 |
| 16 | 321 |
| 17 | 364 |
| 18 | 412 |
| 19 | 478 |
| 20 | 523 |
| 21 | 595 |