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 | 3 |
| 2 | 7 |
| 3 | 27 |
| 4 | 41 |
| 5 | 95 |
| 6 | 185 |
| 7 | 351 |
| 8 | 497 |
| 9 | 3391 |
| 10 | 3537 |
| 11 | 45371 |
| 12 | 82735 |
| 13 | 99065 |
| 14 | 357165 |
| 15 | 840905 |
| 16 | 3880557 |
| 17 | 27914937 |
| 18 | 40517521 |
| 19 | 104715207 |
| 20 | 1126506905 |
| 21 | 2084910531 |
| 22 | 2442825347 |
| 23 | 4332318177 |
| 24 | 6716598047 |
| 25 | 17736392221 |
| 26 | 18205380337 |
| 27 | 30869303807 |
| 28 | 68506021365 |
| 29 | 78491213265 |
| 30 | 85620067845 |