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 | 3 |
| 2 | 81 |
| 3 | 15712 |
| 4 | 23335217 |
| 5 | 262482902920 |
| 6 | 22540704363210913 |
| 7 | 14777630573426014735558 |
| 8 | 74010398585294927963749126971 |
| 9 | 2831737193779046594636895038867701496 |