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 | 7 |
| 2 | 151 |
| 3 | 2848 |
| 4 | 57255 |
| 5 | 1126437 |
| 6 | 22360610 |
| 7 | 436020774 |
| 8 | 8531393529 |
| 9 | 165372103634 |
| 10 | 3209822188135 |
| 11 | 61997477071836 |
| 12 | 1199480307020988 |
| 13 | 23143113343639189 |
| 14 | 447443373807337136 |
| 15 | 8639247851127637315 |