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 | 74 |
| 3 | 4794 |
| 4 | 306874 |
| 5 | 314239934 |
| 6 | 80445423294 |
| 7 | 5148507090874 |
| 8 | 5272071261055934 |
| 9 | 1349650242830319354 |
| 10 | 1382041848658247019502 |
| 11 | 353802713256511236992702 |
| 12 | 362293978374667506680527806 |
| 13 | 1483956135422638107363441897454 |