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 | 43 |
| 3 | 223 |
| 4 | 1303 |
| 5 | 46663 |
| 6 | 21936950640377863 |
| 7 | 4738381338321616903 |
| 8 | 1023490369077469249543 |
| 9 | 221073919720733357899783 |
| 10 | 1047532535594334222593508922191671036215303 |