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 | 23 |
| 3 | 101 |
| 4 | 2129 |
| 5 | 10103 |
| 6 | 210101 |
| 7 | 1010129 |
| 8 | 21010127 |
| 9 | 101010167 |
| 10 | 2101010147 |
| 11 | 10101010163 |
| 12 | 210101010187 |
| 13 | 1010101010341 |
| 14 | 21010101010147 |
| 15 | 101010101010323 |
| 16 | 2101010101010141 |
| 17 | 10101010101010141 |
| 18 | 210101010101010323 |
| 19 | 1010101010101010143 |