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 | 19 |
| 2 | 361 |
| 3 | 456 |
| 4 | 576 |
| 5 | 1776 |
| 6 | 5476 |
| 7 | 15984 |
| 8 | 46656 |
| 9 | 143856 |
| 10 | 443556 |
| 11 | 1312020 |
| 12 | 3880900 |
| 13 | 11871220 |
| 14 | 36312676 |
| 15 | 108154648 |
| 16 | 322130704 |
| 17 | 980104384 |
| 18 | 2982033664 |
| 19 | 8920216800 |
| 20 | 26683222500 |
| 21 | 80907908400 |
| 22 | 245326052416 |
| 23 | 735864237328 |
| 24 | 2207251005124 |