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 | 23 |
| 2 | 115 |
| 3 | 667 |
| 4 | 3887 |
| 5 | 22655 |
| 6 | 132043 |
| 7 | 769603 |
| 8 | 4485575 |
| 9 | 26143847 |
| 10 | 152377507 |
| 11 | 888121195 |
| 12 | 5176349663 |
| 13 | 30169976783 |
| 14 | 175843511035 |
| 15 | 1024891089427 |
| 16 | 5973503025527 |
| 17 | 34816127063735 |
| 18 | 202923259356883 |
| 19 | 1182723429077563 |