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 | 1546 |
| 2 | 140893 |
| 3 | 2390116 |
| 4 | 25710385 |
| 5 | 139555230 |
| 6 | 647845357 |
| 7 | 2132283592 |
| 8 | 6483573889 |
| 9 | 16272395890 |
| 10 | 38904095581 |
| 11 | 82432596396 |
| 12 | 168949326193 |
| 13 | 318823302406 |
| 14 | 587124413485 |
| 15 | 1018357762960 |
| 16 | 1733359959937 |
| 17 | 2819557291482 |
| 18 | 4517952689629 |