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 | 2 |
| 2 | 17 |
| 3 | 149 |
| 4 | 1069 |
| 5 | 10499 |
| 6 | 101999 |
| 7 | 1013899 |
| 8 | 10012999 |
| 9 | 100148999 |
| 10 | 1000009999 |
| 11 | 10000099999 |
| 12 | 100009799999 |
| 13 | 1000000999999 |
| 14 | 10000069999999 |
| 15 | 100001386999999 |
| 16 | 1000001939999999 |
| 17 | 10000004099999999 |
| 18 | 100000001599999999 |
| 19 | 1000000073599999999 |