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 | 10 |
| 1 | 181 |
| 2 | 10801 |
| 3 | 1008001 |
| 4 | 100080001 |
| 5 | 10000800001 |
| 6 | 1000008000001 |
| 7 | 100000080000001 |
| 8 | 10000000800000001 |
| 9 | 1000000008000000001 |
| 10 | 100000000080000000001 |
| 11 | 10000000000800000000001 |