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 | 3 |
| 2 | 4 |
| 3 | 17 |
| 4 | 54 |
| 5 | 176 |
| 6 | 610 |
| 7 | 2197 |
| 8 | 8358 |
| 9 | 34005 |
| 10 | 132483 |
| 11 | 481155 |
| 12 | 1740425 |
| 13 | 6687987 |
| 14 | 27786351 |
| 15 | 119771265 |
| 16 | 505378180 |
| 17 | 2029295253 |
| 18 | 7853415177 |
| 19 | 30644058184 |
| 20 | 126228069143 |
| 21 | 551346605310 |
| 22 | 2456789154285 |
| 23 | 10682911165060 |
| 24 | 44206259595121 |