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 | 2 |
| 2 | 8 |
| 3 | 38 |
| 4 | 196 |
| 5 | 1052 |
| 6 | 5774 |
| 7 | 32146 |
| 8 | 180772 |
| 9 | 1024256 |
| 10 | 5837908 |
| 11 | 33433996 |
| 12 | 192239854 |
| 13 | 1109049320 |
| 14 | 6416509142 |
| 15 | 37215072638 |
| 16 | 216309089956 |
| 17 | 1259663964184 |
| 18 | 7347943049432 |
| 19 | 42926944354480 |
| 20 | 251119894730596 |
| 21 | 1470830479288432 |
| 22 | 8624336421678788 |
| 23 | 50620679934081988 |