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 | 5 |
| 2 | 20 |
| 3 | 88 |
| 4 | 368 |
| 5 | 1504 |
| 6 | 6080 |
| 7 | 24448 |
| 8 | 98048 |
| 9 | 392704 |
| 10 | 1571840 |
| 11 | 6289408 |
| 12 | 25161728 |
| 13 | 100655104 |
| 14 | 402636800 |
| 15 | 1610579968 |