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 | 1 |
| 2 | 5 |
| 3 | 28 |
| 4 | 4101 |
| 5 | 3126 |
| 6 | 362797088 |
| 7 | 823544 |
| 8 | 4398046515205 |
| 9 | 282429536509 |
| 10 | 100000000000003130 |
| 11 | 285311670612 |
| 12 | 137370551967459378662949775392 |
| 13 | 302875106592254 |
| 14 | 229585692886981495483044092 |
| 15 | 1122274146401882171630862528 |