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 | 15 |
| 2 | 150 |
| 3 | 1500 |
| 4 | 15000 |
| 5 | 103125 |
| 6 | 150000 |
| 7 | 1031250 |
| 8 | 1500000 |
| 9 | 10312500 |
| 10 | 15000000 |
| 11 | 103125000 |
| 12 | 130078125 |
| 13 | 150000000 |
| 14 | 1031250000 |
| 15 | 1300781250 |
| 16 | 1500000000 |
| 17 | 10312500000 |