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 | 509 |
| 4 | 569 |
| 5 | 599 |
| 6 | 659 |
| 7 | 5009 |
| 8 | 5059 |
| 9 | 5099 |
| 10 | 5569 |
| 11 | 5659 |
| 12 | 5669 |
| 13 | 6569 |
| 14 | 6599 |
| 15 | 6659 |
| 16 | 6959 |
| 17 | 9059 |
| 18 | 50069 |
| 19 | 50599 |
| 20 | 50909 |
| 21 | 50969 |
| 22 | 55009 |
| 23 | 55609 |
| 24 | 56009 |
| 25 | 56099 |
| 26 | 56509 |
| 27 | 56569 |
| 28 | 56599 |
| 29 | 56659 |
| 30 | 56909 |
| 31 | 56999 |
| 32 | 59009 |
| 33 | 59069 |
| 34 | 59509 |
| 35 | 59659 |
| 36 | 59669 |
| 37 | 59699 |
| 38 | 59999 |
| 39 | 60509 |
| 40 | 60659 |
| 41 | 65099 |