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) |
|---|---|
| 0 | 0 |
| 1 | 11 |
| 2 | 23 |
| 3 | 58 |
| 4 | 132 |
| 5 | 134 |
| 6 | 558 |
| 7 | 914 |
| 8 | 4233 |
| 9 | 3776 |
| 10 | 10987 |
| 11 | 15972 |
| 12 | 58441 |
| 13 | 81676 |
| 14 | 510946 |
| 15 | 1771128 |
| 16 | 6574636 |
| 17 | 8750251 |
| 18 | 21393196 |
| 19 | 41831781 |
| 20 | 151422983 |
| 21 | 204013462 |