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 | 5 |
| 2 | 7 |
| 3 | 67 |
| 4 | 557 |
| 5 | 577 |
| 6 | 677 |
| 7 | 757 |
| 8 | 5557 |
| 9 | 5657 |
| 10 | 6577 |
| 11 | 7577 |
| 12 | 7757 |
| 13 | 55667 |
| 14 | 56767 |
| 15 | 57557 |
| 16 | 57667 |
| 17 | 65557 |
| 18 | 65657 |
| 19 | 65677 |
| 20 | 65777 |
| 21 | 67567 |
| 22 | 67577 |
| 23 | 67757 |
| 24 | 67777 |
| 25 | 75557 |
| 26 | 75577 |
| 27 | 75767 |
| 28 | 76667 |
| 29 | 76757 |
| 30 | 76777 |
| 31 | 77557 |
| 32 | 555557 |
| 33 | 555677 |
| 34 | 555767 |
| 35 | 557567 |
| 36 | 565567 |
| 37 | 565667 |
| 38 | 566557 |
| 39 | 566567 |