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 | 4198 |
| 2 | 33262 |
| 3 | 1564258 |
| 4 | 6672202 |
| 5 | 7566178 |
| 6 | 18181978 |
| 7 | 20193022 |
| 8 | 178433278 |
| 9 | 187466722 |
| 10 | 229580146 |
| 11 | 293158126 |
| 12 | 467821918 |
| 13 | 1125878062 |
| 14 | 1341880018 |
| 15 | 4317369778 |
| 16 | 5198554618 |
| 17 | 8493529942 |
| 18 | 10138087306 |
| 19 | 10594343758 |
| 20 | 20940647698 |