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 | 511 |
| 3 | 497845 |
| 4 | 517884748 |
| 5 | 517500496981 |
| 6 | 492342898340494 |
| 7 | 450205866074148509 |
| 8 | 399858332322926629152 |
| 9 | 347831920544342751131378 |
| 10 | 298149337418229660486879546 |
| 11 | 252909751775727886411508895575 |
| 12 | 212950273659595164912087912232227 |