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 | 3 |
| 2 | 16 |
| 3 | 112 |
| 4 | 818 |
| 5 | 6367 |
| 6 | 52299 |
| 7 | 442972 |
| 8 | 3840740 |
| 9 | 33898001 |
| 10 | 303369367 |
| 11 | 2745366812 |
| 12 | 25071938615 |