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 | 0 |
| 2 | 126 |
| 3 | 3334 |
| 4 | 115870 |
| 5 | 3125547 |
| 6 | 95603353 |
| 7 | 2728695681 |
| 8 | 84096300083 |
| 9 | 2479929517015 |
| 10 | 76694626761338 |
| 11 | 2307939427468880 |
| 12 | 71529843693429266 |
| 13 | 2180882286412943668 |
| 14 | 67732692543466232241 |
| 15 | 2083494574053247942753 |
| 16 | 64842050919022586502567 |