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 | 2 |
| 1 | 14 |
| 2 | 610 |
| 3 | 66734 |
| 4 | 13631170 |
| 5 | 4474847054 |
| 6 | 2154541552930 |
| 7 | 1430306187579374 |
| 8 | 1252111529306645890 |
| 9 | 1397549490970710103694 |
| 10 | 1937106722774840873390050 |
| 11 | 3264361741756845694953780014 |
| 12 | 6572644038805857912224455865410 |
| 13 | 15583184923914619905634967412688334 |
| 14 | 42971525874172716914734880462487351970 |