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 | 6 |
| 2 | 36 |
| 3 | 216 |
| 4 | 1281 |
| 5 | 7536 |
| 6 | 44021 |
| 7 | 255576 |
| 8 | 1475871 |
| 9 | 8482276 |
| 10 | 48543777 |
| 11 | 276756312 |
| 12 | 1572394697 |
| 13 | 8905537932 |
| 14 | 50293202487 |
| 15 | 283276001872 |
| 16 | 1591658418642 |
| 17 | 8922925364502 |
| 18 | 49917266140917 |
| 19 | 278703080519352 |
| 20 | 1553227427718978 |