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 | 7 |
| 2 | 14245 |
| 3 | 28405300 |
| 4 | 9191136045 |
| 5 | 886286703456 |
| 6 | 38188743738145 |
| 7 | 932714257963020 |
| 8 | 14966184483875625 |
| 9 | 173860405001195185 |
| 10 | 1563721100613810061 |
| 11 | 11427034989921521488 |
| 12 | 70319024498214551605 |
| 13 | 374482754394635213250 |
| 14 | 1763001772206469563945 |
| 15 | 7462412915610398239816 |