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 | 157 |
| 3 | 349 |
| 4 | 103 |
| 5 | 314159 |
| 6 | 392699 |
| 7 | 8263 |
| 8 | 7853 |
| 9 | 9786893 |
| 10 | 28954771 |
| 11 | 157079632679 |
| 12 | 68246533 |
| 13 | 4304347 |
| 14 | 67649047 |
| 15 | 1002742628021 |
| 16 | 1170899 |
| 17 | 990371647 |
| 18 | 14523877 |
| 19 | 1186001 |
| 20 | 1023100457 |
| 21 | 451661057 |
| 22 | 1492315939 |
| 23 | 381315143078063 |
| 24 | 950007203269 |