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 | 1 |
| 2 | 277 |
| 3 | 76729 |
| 4 | 3204336 |
| 5 | 133818624 |
| 6 | 7767356736 |
| 7 | 450847788304 |
| 8 | 24315232188224 |
| 9 | 1311374995519744 |
| 10 | 71269232804067408 |