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 | 449 |
| 2 | 499 |
| 3 | 4649 |
| 4 | 4969 |
| 5 | 4999 |
| 6 | 6449 |
| 7 | 6469 |
| 8 | 6949 |
| 9 | 9649 |
| 10 | 9949 |
| 11 | 44449 |
| 12 | 44699 |
| 13 | 46499 |
| 14 | 46649 |
| 15 | 49499 |
| 16 | 49669 |
| 17 | 49999 |
| 18 | 64499 |
| 19 | 64969 |
| 20 | 66449 |
| 21 | 66499 |
| 22 | 66949 |
| 23 | 69499 |
| 24 | 94649 |
| 25 | 94949 |
| 26 | 94999 |
| 27 | 96469 |
| 28 | 99469 |
| 29 | 444449 |
| 30 | 444469 |
| 31 | 444649 |
| 32 | 446969 |
| 33 | 449699 |
| 34 | 464699 |
| 35 | 464999 |
| 36 | 466649 |
| 37 | 469649 |
| 38 | 469969 |