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 | 4 |
| 3 | 74 |
| 4 | 8457 |
| 5 | 186282390 |
| 6 | 430917181166219 |
| 7 | 41151315877490090952542206046 |
| 8 | 13991468824374967392702752173757116934238293984253807017 |