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 | 0 |
| 2 | 1 |
| 3 | 11 |
| 4 | 110 |
| 5 | 2402 |
| 6 | 128967 |
| 7 | 16767653 |
| 8 | 5436906668 |
| 9 | 4406952731948 |
| 10 | 8819634719356421 |
| 11 | 43329348004927734247 |
| 12 | 522235268182347360718818 |
| 13 | 15436131339319739257518081878 |
| 14 | 1117847654274955574635482276231683 |
| 15 | 198163274851163063009517020867737770265 |