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 | 30 |
| 2 | 1519 |
| 3 | 122156 |
| 4 | 14466221 |
| 5 | 2379402090 |
| 6 | 519987386619 |
| 7 | 145897455555864 |
| 8 | 51151581893323161 |
| 9 | 21923440338694533750 |
| 10 | 11281206541276562523975 |
| 11 | 6864911325693596764930500 |
| 12 | 4877239291150357692189181125 |