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 | 226 |
| 3 | 1837 |
| 4 | 2163 |
| 5 | 5358 |
| 6 | 44857 |
| 7 | 170788 |
| 8 | 482721 |
| 9 | 8918391 |
| 10 | 36589396 |
| 11 | 122394502 |
| 12 | 1107852077 |
| 13 | 10071260304 |
| 14 | 22991513047 |
| 15 | 81477190549 |
| 16 | 422242473309 |
| 17 | 4242315932866 |
| 18 | 153777057499935 |
| 19 | 282960008506695 |
| 20 | 1683262946768556 |
| 21 | 1099372130016731506 |
| 22 | 1117679864051418714 |