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 | 59 |
| 3 | 89 |
| 4 | 599 |
| 5 | 859 |
| 6 | 8599 |
| 7 | 8999 |
| 8 | 9859 |
| 9 | 55589 |
| 10 | 55889 |
| 11 | 58889 |
| 12 | 59999 |
| 13 | 85889 |
| 14 | 85999 |
| 15 | 88589 |
| 16 | 89599 |
| 17 | 89899 |
| 18 | 89959 |
| 19 | 89989 |
| 20 | 95959 |
| 21 | 95989 |
| 22 | 98899 |
| 23 | 98999 |
| 24 | 99559 |
| 25 | 99859 |
| 26 | 99989 |
| 27 | 555589 |
| 28 | 558599 |
| 29 | 559859 |
| 30 | 585889 |
| 31 | 585899 |
| 32 | 585989 |
| 33 | 589859 |
| 34 | 598999 |
| 35 | 599899 |
| 36 | 599959 |
| 37 | 599999 |
| 38 | 855889 |