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 | 1 |
| 1 | 8 |
| 2 | 44 |
| 3 | 192 |
| 4 | 726 |
| 5 | 2464 |
| 6 | 7704 |
| 7 | 22528 |
| 8 | 62337 |
| 9 | 164560 |
| 10 | 417140 |
| 11 | 1020416 |
| 12 | 2418710 |
| 13 | 5573568 |
| 14 | 12520744 |
| 15 | 27484160 |
| 16 | 59068372 |
| 17 | 124505880 |
| 18 | 257770964 |
| 19 | 524871424 |
| 20 | 1052316364 |
| 21 | 2079491744 |
| 22 | 4053978040 |
| 23 | 7803219968 |
| 24 | 14840711765 |
| 25 | 27907041392 |
| 26 | 51917588800 |
| 27 | 95608651776 |