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 | 20 |
| 2 | 301 |
| 3 | 4040 |
| 4 | 51001 |
| 5 | 620060 |
| 6 | 7352101 |
| 7 | 85656080 |
| 8 | 985263601 |
| 9 | 11225320100 |
| 10 | 126965305501 |
| 11 | 1427999420120 |
| 12 | 15990423157801 |
| 13 | 178436520564140 |
| 14 | 1985678518660501 |
| 15 | 22048354837360160 |
| 16 | 244384923399813601 |