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 | 2 |
| 2 | 130 |
| 3 | 4376 |
| 4 | 312706 |
| 5 | 20156252 |
| 6 | 1622278624 |
| 7 | 132282417920 |
| 8 | 11716609750402 |
| 9 | 1067553850832372 |
| 10 | 101275413131018380 |
| 11 | 9844149854624122160 |
| 12 | 980597565209377223200 |
| 13 | 99518148302583383833280 |
| 14 | 10272819477206557916630080 |
| 15 | 1075608762378043981968997376 |