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 | 60 |
| 3 | 1000 |
| 4 | 20000 |
| 5 | 450000 |
| 6 | 11000000 |
| 7 | 286000000 |
| 8 | 7800000000 |
| 9 | 221000000000 |
| 10 | 6460000000000 |
| 11 | 193800000000000 |
| 12 | 5943200000000000 |
| 13 | 185725000000000000 |
| 14 | 5899500000000000000 |
| 15 | 190095000000000000000 |
| 16 | 6203100000000000000000 |