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 | 13 |
| 2 | 21 |
| 3 | 197 |
| 4 | 1991 |
| 5 | 1022859 |
| 6 | 1346570 |
| 7 | 1351632 |
| 8 | 15919007 |
| 9 | 22440783 |
| 10 | 415638567 |
| 11 | 9345895862 |