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 | 0 |
| 2 | 600 |
| 3 | 10100 |
| 4 | 390000 |
| 5 | 1001000 |
| 6 | 100030002 |
| 7 | 100010000 |
| 8 | 10000300002 |
| 9 | 10000100000 |
| 10 | 1000003000002 |
| 11 | 1000001000000 |
| 12 | 100000030000002 |
| 13 | 100000010000000 |
| 14 | 10000000300000002 |
| 15 | 10000000100000000 |