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 | 444 |
| 2 | 644 |
| 3 | 664 |
| 4 | 666 |
| 5 | 966 |
| 6 | 996 |
| 7 | 999 |
| 8 | 4444 |
| 9 | 4466 |
| 10 | 4494 |
| 11 | 4696 |
| 12 | 4964 |
| 13 | 6644 |
| 14 | 6666 |
| 15 | 6699 |
| 16 | 9444 |
| 17 | 9496 |
| 18 | 9646 |
| 19 | 9964 |
| 20 | 9966 |
| 21 | 9999 |
| 22 | 44444 |
| 23 | 44499 |
| 24 | 44646 |
| 25 | 44996 |
| 26 | 46444 |
| 27 | 46449 |
| 28 | 46964 |
| 29 | 46996 |
| 30 | 49444 |
| 31 | 49494 |
| 32 | 49946 |
| 33 | 49966 |
| 34 | 49996 |
| 35 | 64446 |
| 36 | 64494 |
| 37 | 64644 |
| 38 | 64666 |