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 | 35 |
| 2 | 835 |
| 3 | 17360 |
| 4 | 342769 |
| 5 | 6687009 |
| 6 | 131590430 |
| 7 | 2642422750 |
| 8 | 54509190076 |
| 9 | 1159615530788 |
| 10 | 25497032420496 |
| 11 | 580087776122400 |
| 12 | 13662528306823824 |
| 13 | 333132304121991504 |
| 14 | 8407011584355624288 |
| 15 | 219490450157530821024 |
| 16 | 5925108461354500651776 |
| 17 | 165275526944869750483200 |