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 | 1 |
| 2 | 15 |
| 3 | 157 |
| 4 | 1570 |
| 5 | 15707 |
| 6 | 157079 |
| 7 | 1570796 |
| 8 | 15707963 |
| 9 | 157079632 |
| 10 | 1570796326 |
| 11 | 15707963267 |
| 12 | 157079632679 |
| 13 | 1570796326794 |
| 14 | 15707963267948 |
| 15 | 157079632679489 |
| 16 | 1570796326794896 |
| 17 | 15707963267948966 |
| 18 | 157079632679489661 |
| 19 | 1570796326794896619 |
| 20 | 15707963267948966192 |