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 | 4 |
| 3 | 5 |
| 4 | 7 |
| 5 | 8 |
| 6 | 18 |
| 7 | 384 |
| 8 | 7958 |
| 9 | 14304 |
| 10 | 16623 |
| 11 | 18610 |
| 12 | 20685 |
| 13 | 72923 |
| 14 | 883177 |
| 15 | 1516692 |
| 16 | 2493788 |
| 17 | 2504069 |
| 18 | 22881179 |
| 19 | 110219466 |
| 20 | 2241255405 |
| 21 | 34982468090 |
| 22 | 64356019489 |
| 23 | 110512265214 |
| 24 | 1142808349967 |
| 25 | 3550630472116 |
| 26 | 5238523454726 |
| 27 | 7129035664265 |