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 | 31 |
| 3 | 31469 |
| 4 | 314107 |
| 5 | 314159 |
| 6 | 314159 |
| 7 | 314159207 |
| 8 | 3141592603 |
| 9 | 31415926541 |
| 10 | 314159265307 |
| 11 | 314159265359 |
| 12 | 3141592653581 |
| 13 | 314159265358909 |
| 14 | 3141592653589711 |
| 15 | 31415926535897921 |
| 16 | 314159265358979347 |
| 17 | 3141592653589793239 |
| 18 | 3141592653589793239 |
| 19 | 314159265358979323861 |