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 | 3 |
| 3 | 15 |
| 4 | 127 |
| 5 | 249 |
| 6 | 1361 |
| 7 | 2483 |
| 8 | 3705 |
| 9 | 14817 |
| 10 | 25939 |
| 11 | 37151 |
| 12 | 48373 |
| 13 | 60495 |
| 14 | 72717 |
| 15 | 183829 |
| 16 | 294951 |
| 17 | 406163 |
| 18 | 517385 |
| 19 | 629507 |
| 20 | 741719 |
| 21 | 853941 |
| 22 | 975163 |
| 23 | 1097385 |
| 24 | 2208497 |
| 25 | 3319619 |
| 26 | 4430831 |
| 27 | 5542053 |
| 28 | 6654165 |
| 29 | 7766287 |
| 30 | 8878499 |
| 31 | 9990721 |