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 | 9 |
| 2 | 4 |
| 3 | 18 |
| 4 | 167 |
| 5 | 2401 |
| 6 | 4086461727 |
| 7 | 14079962896835441528 |
| 8 | 309880704108832516500624685064706000856 |
| 9 | 4681896102766617737298881383797502847166028831212571921983062786215145771871779 |