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 | 19 |
| 3 | 104 |
| 4 | 1789 |
| 5 | 28089 |
| 6 | 456649 |
| 7 | 7455411 |
| 8 | 121708555 |
| 9 | 1990954802 |
| 10 | 32547397369 |
| 11 | 532327808168 |
| 12 | 8705226732028 |
| 13 | 142365129531729 |
| 14 | 2328217142648763 |
| 15 | 38075317550124085 |
| 16 | 622678903591246459 |
| 17 | 10183203860874999028 |