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 | 12 |
| 2 | 280 |
| 3 | 4080 |
| 4 | 64189 |
| 5 | 1012315 |
| 6 | 16031147 |
| 7 | 253594307 |
| 8 | 4003959566 |
| 9 | 63279327977 |
| 10 | 1000139739583 |
| 11 | 15804787030137 |
| 12 | 249762291976009 |
| 13 | 3947048440634688 |
| 14 | 62375786616766976 |
| 15 | 985731805754249812 |
| 16 | 15577646241372914358 |