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 | 7 |
| 2 | 631 |
| 3 | 279847 |
| 4 | 4879687 |
| 5 | 12117367 |
| 6 | 20151127 |
| 7 | 28398247 |
| 8 | 62742247 |
| 9 | 68574967 |
| 10 | 81450631 |
| 11 | 174900631 |
| 12 | 1330863367 |
| 13 | 1698181687 |
| 14 | 3373402567 |
| 15 | 3722098087 |
| 16 | 4499860567 |
| 17 | 5719140631 |
| 18 | 9354951847 |
| 19 | 16610312167 |
| 20 | 18141126727 |