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) |
|---|---|
| 0 | 1 |
| 1 | 26 |
| 2 | 3246 |
| 3 | 606500 |
| 4 | 137915470 |
| 5 | 35218238076 |
| 6 | 9702014515116 |
| 7 | 2818627826459016 |
| 8 | 851612982884556750 |
| 9 | 265166341958122567820 |
| 10 | 84556145346599067308596 |
| 11 | 27489903606068331188121816 |
| 12 | 9081510922185418532993154796 |