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 | 5 |
| 3 | 7 |
| 4 | 13 |
| 5 | 15 |
| 6 | 18 |
| 7 | 22 |
| 8 | 61 |
| 9 | 85 |
| 10 | 208 |
| 11 | 271 |
| 12 | 898 |
| 13 | 2142 |
| 14 | 2856 |
| 15 | 4392 |
| 16 | 17171 |
| 17 | 74886 |
| 18 | 78901 |
| 19 | 271951 |
| 20 | 326600 |