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 | 3456 |
| 2 | 9101112 |
| 3 | 13141516 |
| 4 | 17181920 |
| 5 | 21222324 |
| 6 | 25262728 |
| 7 | 29303132 |
| 8 | 33343536 |
| 9 | 37383940 |
| 10 | 41424344 |
| 11 | 45464748 |
| 12 | 49505152 |
| 13 | 53545556 |
| 14 | 57585960 |
| 15 | 61626364 |
| 16 | 65666768 |
| 17 | 69707172 |
| 18 | 73747576 |
| 19 | 77787980 |
| 20 | 81828384 |
| 21 | 85868788 |
| 22 | 89909192 |
| 23 | 93949596 |
| 24 | 979899100 |
| 25 | 101102103104 |