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 | 1 |
| 2 | 16 |
| 3 | 196 |
| 4 | 2197 |
| 5 | 22952 |
| 6 | 223034 |
| 7 | 2004975 |
| 8 | 16642937 |
| 9 | 127654604 |
| 10 | 907349654 |
| 11 | 6000728764 |
| 12 | 37093282121 |
| 13 | 215296646264 |
| 14 | 1178514299094 |
| 15 | 6108871834312 |
| 16 | 30098215339608 |
| 17 | 141433252447082 |
| 18 | 635816643771438 |
| 19 | 2742163498527536 |
| 20 | 11374522802412498 |
| 21 | 45482770393453638 |