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) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 318 |
| 3 | 30804 |
| 4 | 3941598 |
| 5 | 586637256 |
| 6 | 96197661156 |
| 7 | 16875655269948 |
| 8 | 3111284141045598 |
| 9 | 595909785174057204 |
| 10 | 117634021777132574568 |
| 11 | 23797087019979071174580 |
| 12 | 4912693780461352534397604 |
| 13 | 1031629572413246016139181544 |
| 14 | 219809927417367534490107035244 |
| 15 | 47426945434432859336092700072304 |