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 | 2 |
| 2 | 874 |
| 3 | 5830 |
| 4 | 2615298 |
| 5 | 712377380 |
| 6 | 86810649294 |
| 7 | 794712005370 |
| 8 | 105784534314378 |
| 9 | 92542301212047102 |
| 10 | 82704567079549985700 |
| 11 | 24733255676526572596026 |
| 12 | 3612032130800990065125528 |
| 13 | 8102184022428756416738378 |