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 | 2 |
| 3 | 6 |
| 4 | 11 |
| 5 | 18 |
| 6 | 25 |
| 7 | 35 |
| 8 | 45 |
| 9 | 56 |
| 10 | 69 |
| 11 | 83 |
| 12 | 97 |
| 13 | 115 |
| 14 | 131 |
| 15 | 150 |
| 16 | 169 |
| 17 | 189 |
| 18 | 212 |
| 19 | 234 |
| 20 | 258 |
| 21 | 284 |