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 | 6 |
| 3 | 21 |
| 4 | 23 |
| 5 | 221 |
| 6 | 78 |
| 7 | 7278 |
| 8 | 153 |
| 9 | 703 |
| 10 | 1653 |
| 11 | 6695846 |
| 12 | 496 |
| 13 | 670758346 |
| 14 | 8346 |
| 15 | 1471 |
| 16 | 1081 |