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 | 17 |
| 2 | 429 |
| 3 | 10593 |
| 4 | 260557 |
| 5 | 6415089 |
| 6 | 157933741 |
| 7 | 3888200065 |
| 8 | 95724317069 |
| 9 | 2356654610641 |
| 10 | 58018914711981 |
| 11 | 1428378365629601 |
| 12 | 35165510520296269 |
| 13 | 865746191545503153 |
| 14 | 21313965220121585837 |
| 15 | 524732442187736997569 |