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 | 141592653589 |
| 2 | 415926535897 |
| 3 | 28841971693 |
| 4 | 884197169399 |
| 5 | 494459230781 |
| 6 | 282306647093 |
| 7 | 359408128481 |
| 8 | 174502841027 |
| 9 | 810975665933 |
| 10 | 128475648233 |
| 11 | 326648213393 |
| 12 | 146951941511 |
| 13 | 727036575959 |
| 14 | 575959195309 |
| 15 | 953092186117 |