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 | 1 |
| 2 | 9 |
| 3 | 153 |
| 4 | 3309 |
| 5 | 81837 |
| 6 | 2205489 |
| 7 | 63113061 |
| 8 | 1887993993 |
| 9 | 58441956579 |
| 10 | 1858846428437 |
| 11 | 60445700665383 |
| 12 | 2001985304489169 |
| 13 | 67341781440810531 |
| 14 | 2295424989986481345 |