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 | 1 |
| 1 | 5 |
| 2 | 100 |
| 3 | 250 |
| 4 | 10000 |
| 5 | 25000 |
| 6 | 1000000 |
| 7 | 2500000 |
| 8 | 100000000 |
| 9 | 250000000 |
| 10 | 10000000000 |
| 11 | 25000000000 |
| 12 | 1000000000000 |
| 13 | 2500000000000 |
| 14 | 100000000000000 |
| 15 | 250000000000000 |
| 16 | 10000000000000000 |
| 17 | 25000000000000000 |