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 | 2 |
| 1 | 6 |
| 2 | 22 |
| 3 | 278 |
| 4 | 65814 |
| 5 | 4295033110 |
| 6 | 18446744078004584726 |
| 7 | 340282366920938463481821351509772796182 |
| 8 | 115792089237316195423570985008687907853610267032561502502939405359422902436118 |