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) |
|---|---|
| 2 | 1 |
| 3 | 7 |
| 4 | 57 |
| 5 | 973 |
| 6 | 32057 |
| 7 | 2079427 |
| 8 | 267620753 |
| 9 | 68649126489 |
| 10 | 35172776136145 |
| 11 | 36025104013571583 |
| 12 | 73784683970720501897 |
| 13 | 302228664636911612364581 |
| 14 | 2475873390079769597467385417 |
| 15 | 40564787539999607393632514635067 |
| 16 | 1329227699017403425105119604848703905 |