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 | 9 |
| 2 | 129 |
| 3 | 3351 |
| 4 | 136564 |
| 5 | 6979061 |
| 6 | 371484319 |
| 7 | 18470742266 |
| 8 | 818230288201 |
| 9 | 31887670171373 |
| 10 | 1096628939510047 |
| 11 | 33575397457792227 |
| 12 | 924491977646105742 |
| 13 | 23115171441961340021 |
| 14 | 529351592443419400759 |
| 15 | 11186675629728308277811 |