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 | 1 |
| 2 | 7 |
| 3 | 116 |
| 4 | 8282 |
| 5 | 2168384 |
| 6 | 2395241200 |
| 7 | 10025552678528 |
| 8 | 170709896192664592 |
| 9 | 11335779739243176963200 |
| 10 | 3029239690552322424003098368 |