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 | 0 |
| 1 | 10 |
| 2 | 110 |
| 3 | 1020 |
| 4 | 10120 |
| 5 | 100040 |
| 6 | 1001220 |
| 7 | 10000060 |
| 8 | 100010240 |
| 9 | 1000002060 |
| 10 | 10000100440 |
| 11 | 100000000100 |
| 12 | 1000001022240 |
| 13 | 10000000000120 |
| 14 | 100000010000660 |
| 15 | 1000000000204080 |
| 16 | 10000000100020480 |
| 17 | 100000000000000160 |
| 18 | 1000000001002002660 |