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) |
|---|---|
| 3 | 1 |
| 4 | 0 |
| 5 | 8 |
| 6 | 13 |
| 7 | 14 |
| 8 | 25 |
| 9 | 24 |
| 10 | 74 |
| 11 | 112 |
| 12 | 127 |
| 13 | 125 |
| 14 | 165 |
| 15 | 265 |
| 16 | 1265 |
| 17 | 2568 |
| 18 | 12468 |
| 19 | 1002568 |
| 20 | 1001002568 |
| 21 | 1000001001002568 |
| 22 | 1000000001000001001002568 |
| 23 | 1001000000001000001001002568 |