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 | 8 |
| 3 | 407 |
| 4 | 140456 |
| 5 | 337520898 |
| 6 | 5673390747984 |
| 7 | 667480099386451779 |
| 8 | 549699898523248769128232 |
| 9 | 3168911624115201777713785471406 |
| 10 | 127877020635106970108300418456422667248 |