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) |
|---|---|
| 3 | 273 |
| 4 | 1995 |
| 5 | 356235 |
| 6 | 6768465 |
| 7 | 215561445 |
| 8 | 8381978605 |
| 9 | 889577580507 |
| 10 | 9176928067615 |
| 11 | 977229739621135 |
| 12 | 159778696591499755 |
| 13 | 12961232730855705065 |
| 14 | 5133226984135500020155 |
| 15 | 527303555325724107882055 |
| 16 | 36714792413117114527127897 |
| 17 | 96369422480705367222515908615 |