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 | 10 |
| 3 | 101 |
| 4 | 1011 |
| 5 | 10112 |
| 6 | 101123 |
| 7 | 1011235 |
| 8 | 10112358 |
| 9 | 101123593 |
| 10 | 1011235951 |
| 11 | 10112359544 |
| 12 | 101123595495 |
| 13 | 1011235955039 |
| 14 | 10112359550534 |
| 15 | 101123595505573 |
| 16 | 1011235955056107 |
| 17 | 10112359550561680 |
| 18 | 101123595505617787 |
| 19 | 1011235955056179467 |
| 20 | 10112359550561797254 |