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 | 10 |
| 2 | 100 |
| 3 | 3000 |
| 4 | 10000 |
| 5 | 100000 |
| 6 | 3000000 |
| 7 | 70000000 |
| 8 | 100000000 |
| 9 | 9000000000 |
| 10 | 10000000000 |
| 11 | 0 |
| 12 | 3000000000000 |
| 13 | 0 |
| 14 | 700000000000000 |
| 15 | 3000000000000000 |