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 | 0 |
| 1 | 3 |
| 2 | 8 |
| 3 | 36 |
| 4 | 212 |
| 5 | 1496 |
| 6 | 12128 |
| 7 | 110288 |
| 8 | 1108064 |
| 9 | 12171872 |
| 10 | 145061120 |
| 11 | 1864321472 |
| 12 | 25710635648 |
| 13 | 378871778432 |
| 14 | 5943632568320 |
| 15 | 98936446059776 |
| 16 | 1742232571097600 |
| 17 | 32367994818881024 |
| 18 | 632845309575139328 |
| 19 | 12991224275641441280 |