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) |
|---|---|
| 0 | 6 |
| 1 | 18 |
| 2 | 95 |
| 3 | 340 |
| 4 | 9492 |
| 5 | 133706 |
| 6 | 1693729 |
| 7 | 104107693 |
| 8 | 692068995 |
| 9 | 3295399249 |
| 10 | 61983607042 |
| 11 | 294907287147 |
| 12 | 3866887203952 |
| 13 | 1457331336561977 |
| 14 | 13487103824303426 |
| 15 | 2733476358186221751 |
| 16 | 10531585738509590966 |
| 17 | 622459086032261357787 |
| 18 | 13355793438644297530372 |
| 19 | 210369234254618733763935 |