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 | 5 |
| 3 | 13 |
| 4 | 563 |
| 5 | 5971 |
| 6 | 558771 |
| 7 | 1964215 |
| 8 | 8121909 |
| 9 | 12326713 |
| 10 | 23025711 |
| 11 | 26921605 |
| 12 | 341569806 |
| 13 | 399292158 |