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 | 4 |
| 2 | 160 |
| 3 | 9731 |
| 4 | 638996 |
| 5 | 41991129 |
| 6 | 2701569493 |
| 7 | 169750613182 |
| 8 | 10454910167463 |
| 9 | 634179969235617 |
| 10 | 38050532050437859 |