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 | 3 |
| 3 | 5 |
| 4 | 13 |
| 5 | 20 |
| 6 | 44 |
| 7 | 89 |
| 8 | 192 |
| 9 | 396 |
| 10 | 814 |
| 11 | 1610 |
| 12 | 3130 |
| 13 | 6103 |
| 14 | 12229 |
| 15 | 24736 |
| 16 | 49879 |
| 17 | 100747 |
| 18 | 203765 |
| 19 | 411403 |