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 | 0 |
| 2 | 69 |
| 3 | 96 |
| 4 | 609 |
| 5 | 906 |
| 6 | 6009 |
| 7 | 6699 |
| 8 | 6969 |
| 9 | 9006 |
| 10 | 9696 |
| 11 | 9966 |
| 12 | 60009 |
| 13 | 66099 |
| 14 | 69069 |
| 15 | 90006 |
| 16 | 96096 |
| 17 | 99066 |
| 18 | 600009 |
| 19 | 606909 |
| 20 | 609609 |
| 21 | 660099 |
| 22 | 666999 |
| 23 | 669699 |
| 24 | 690069 |
| 25 | 696969 |
| 26 | 699669 |
| 27 | 900006 |
| 28 | 906906 |
| 29 | 909606 |
| 30 | 960096 |
| 31 | 966996 |
| 32 | 969696 |
| 33 | 990066 |
| 34 | 996966 |
| 35 | 999666 |
| 36 | 6000009 |
| 37 | 6060909 |