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 | 8 |
| 2 | 64 |
| 3 | 476 |
| 4 | 3472 |
| 5 | 25088 |
| 6 | 180292 |
| 7 | 1291052 |
| 8 | 9222184 |
| 9 | 65755592 |
| 10 | 468196540 |
| 11 | 3330042548 |
| 12 | 23664113536 |
| 13 | 168042120176 |
| 14 | 1192574364148 |
| 15 | 8459259667964 |
| 16 | 59977781663128 |
| 17 | 425093823838040 |
| 18 | 3011867733313516 |
| 19 | 21333411555220100 |