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 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 11 |
| 4 | 82 |
| 5 | 257 |
| 6 | 130638 |
| 7 | 130895 |
| 8 | 785113 |
| 9 | 4056460 |
| 10 | 4841573 |
| 11 | 8898033 |
| 12 | 13739606 |
| 13 | 36377245 |
| 14 | 50116851 |
| 15 | 86494096 |
| 16 | 2125975155 |
| 17 | 2212469251 |
| 18 | 4338444406 |
| 19 | 6550913657 |
| 20 | 23991185377 |
| 21 | 78524469788 |
| 22 | 2379725279017 |
| 23 | 9597425585856 |
| 24 | 98353981137577 |