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 | 10123457689 |
| 2 | 10123456789 |
| 3 | 1023456879 |
| 4 | 1023456987 |
| 5 | 1023456897 |
| 6 | 1023456789 |
| 7 | 1023456798 |
| 8 | 1023457896 |
| 9 | 1023486975 |
| 10 | 1023479856 |
| 11 | 1023458976 |
| 12 | 1023475968 |
| 13 | 1024973568 |
| 14 | 1023579648 |
| 15 | 1024897536 |
| 16 | 1023657984 |
| 17 | 1032984576 |
| 18 | 1034698752 |
| 19 | 1093865472 |
| 20 | 1074659328 |
| 21 | 1072963584 |