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 | 2 |
| 1 | 2 |
| 2 | 2 |
| 3 | 2 |
| 4 | 2 |
| 5 | 30 |
| 6 | 102 |
| 7 | 120 |
| 8 | 278 |
| 9 | 46 |
| 10 | 824 |
| 11 | 150 |
| 12 | 1534 |
| 13 | 30406 |
| 14 | 67234 |
| 15 | 70906 |
| 16 | 48594 |
| 17 | 62722 |
| 18 | 24518 |
| 19 | 75898 |
| 20 | 919444 |