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 | 33 |
| 2 | 99 |
| 3 | 1119111 |
| 4 | 10110901101 |
| 5 | 11110901111 |
| 6 | 101109901101 |
| 7 | 1011109011101 |
| 8 | 1110109010111 |
| 9 | 10111099011101 |
| 10 | 100110090011001 |
| 11 | 100111090111001 |
| 12 | 101011090110101 |
| 13 | 111001090100111 |