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 | 247 |
| 2 | 1775 |
| 3 | 13052 |
| 4 | 100843 |
| 5 | 790734 |
| 6 | 6247708 |
| 7 | 49523566 |
| 8 | 393172015 |
| 9 | 3123669457 |
| 10 | 24825649060 |
| 11 | 197336983976 |
| 12 | 1568744380184 |
| 13 | 12471338622425 |
| 14 | 99147670133944 |
| 15 | 788235696873315 |
| 16 | 6266596802635677 |
| 17 | 49820538186135672 |
| 18 | 396082433072779827 |