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 | 0 |
| 1 | 11 |
| 2 | 132 |
| 3 | 143 |
| 4 | 1584 |
| 5 | 1595 |
| 6 | 1716 |
| 7 | 1727 |
| 8 | 19008 |
| 9 | 19019 |
| 10 | 19140 |
| 11 | 19151 |
| 12 | 20592 |
| 13 | 20603 |
| 14 | 20724 |
| 15 | 20735 |
| 16 | 228096 |
| 17 | 228107 |
| 18 | 228228 |
| 19 | 228239 |
| 20 | 229680 |
| 21 | 229691 |
| 22 | 229812 |
| 23 | 229823 |
| 24 | 247104 |
| 25 | 247115 |
| 26 | 247236 |
| 27 | 247247 |
| 28 | 248688 |
| 29 | 248699 |
| 30 | 248820 |
| 31 | 248831 |
| 32 | 2737152 |