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 | 5557 |
| 2 | 15551 |
| 3 | 15559 |
| 4 | 45553 |
| 5 | 45557 |
| 6 | 55501 |
| 7 | 55511 |
| 8 | 55529 |
| 9 | 55541 |
| 10 | 55547 |
| 11 | 55579 |
| 12 | 55589 |
| 13 | 65551 |
| 14 | 65557 |
| 15 | 75553 |
| 16 | 75557 |
| 17 | 105557 |
| 18 | 115553 |
| 19 | 125551 |
| 20 | 135559 |
| 21 | 155501 |
| 22 | 155509 |
| 23 | 155521 |
| 24 | 155537 |
| 25 | 155539 |
| 26 | 155557 |
| 27 | 155569 |
| 28 | 155579 |
| 29 | 155581 |
| 30 | 155593 |
| 31 | 155599 |
| 32 | 165551 |