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 | 345 |
| 2 | 51213 |
| 3 | 72425 |
| 4 | 81517 |
| 5 | 94041 |
| 6 | 116061 |
| 7 | 123537 |
| 8 | 166365 |
| 9 | 202129 |
| 10 | 284553 |
| 11 | 335665 |
| 12 | 367785 |
| 13 | 398089 |
| 14 | 485573 |
| 15 | 657297 |
| 16 | 2099101 |
| 17 | 6091109 |
| 18 | 15112113 |
| 19 | 17144145 |
| 20 | 19180181 |
| 21 | 21220221 |
| 22 | 23264265 |
| 23 | 24143145 |
| 24 | 25312313 |
| 25 | 28195197 |
| 26 | 29420421 |
| 27 | 31480481 |