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 | 140 |
| 2 | 1820 |
| 3 | 21364 |
| 4 | 273728 |
| 5 | 3579520 |
| 6 | 47040968 |
| 7 | 622300326 |
| 8 | 8281149188 |
| 9 | 110718596524 |
| 10 | 1486040082748 |
| 11 | 20010711643976 |
| 12 | 270217094416868 |
| 13 | 3657780168834780 |
| 14 | 49618552941019396 |
| 15 | 674346504318284036 |