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) |
|---|---|
| 0 | 3 |
| 1 | 31 |
| 2 | 314 |
| 3 | 1047 |
| 4 | 31415 |
| 5 | 314159 |
| 6 | 785398 |
| 7 | 31415926 |
| 8 | 104719755 |
| 9 | 3141592653 |
| 10 | 31415926535 |
| 11 | 314159265358 |
| 12 | 3141592653589 |
| 13 | 31415926535897 |
| 14 | 314159265358979 |
| 15 | 3141592653589793 |
| 16 | 2243994752564138 |
| 17 | 314159265358979323 |
| 18 | 3141592653589793238 |
| 19 | 1963495408493620774 |