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 | 9 |
| 3 | 177 |
| 4 | 9800 |
| 5 | 1131750 |
| 6 | 225598527 |
| 7 | 69153712446 |
| 8 | 30211650109440 |
| 9 | 17832410391617082 |
| 10 | 13670065258130703125 |
| 11 | 13203133188522251881137 |
| 12 | 15685246720965582029887488 |
| 13 | 22477297594725738707224270105 |
| 14 | 38231902029181930196176183861755 |
| 15 | 76144787589417130318451646093750000 |