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) |
|---|---|
| 4 | 14 |
| 5 | 386 |
| 6 | 5868 |
| 7 | 2310 |
| 8 | 65954 |
| 9 | 100156 |
| 10 | 614404 |
| 11 | 2278660 |
| 12 | 570570 |
| 13 | 5030004 |
| 14 | 36703824 |
| 15 | 34374186 |
| 16 | 37460376 |
| 17 | 472592916 |
| 18 | 1059255456 |
| 19 | 211083730 |
| 20 | 259477218 |
| 21 | 5188948072 |
| 22 | 22555934280 |
| 23 | 16476937840 |
| 24 | 1697186964 |
| 25 | 50534154408 |
| 26 | 375708427812 |
| 27 | 647739636160 |
| 28 | 111159740692 |