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 | 7 |
| 2 | 47 |
| 3 | 487 |
| 4 | 787 |
| 5 | 877 |
| 6 | 887 |
| 7 | 4007 |
| 8 | 4447 |
| 9 | 4787 |
| 10 | 4877 |
| 11 | 7477 |
| 12 | 7487 |
| 13 | 7877 |
| 14 | 8087 |
| 15 | 8447 |
| 16 | 8707 |
| 17 | 8747 |
| 18 | 8807 |
| 19 | 8887 |
| 20 | 40087 |
| 21 | 40487 |
| 22 | 40787 |
| 23 | 40847 |
| 24 | 44087 |
| 25 | 44777 |
| 26 | 44887 |
| 27 | 47087 |
| 28 | 47407 |
| 29 | 47777 |
| 30 | 47807 |
| 31 | 48407 |
| 32 | 48487 |
| 33 | 48787 |
| 34 | 48847 |
| 35 | 70487 |
| 36 | 70877 |
| 37 | 74047 |
| 38 | 74077 |
| 39 | 74707 |
| 40 | 74747 |
| 41 | 74887 |
| 42 | 77047 |