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 | 113717421 |
| 2 | 113717422 |
| 3 | 113717431 |
| 4 | 113717433 |
| 5 | 113717442 |
| 6 | 113717443 |
| 7 | 113717521 |
| 8 | 113717522 |
| 9 | 113717541 |
| 10 | 113717544 |
| 11 | 113717552 |
| 12 | 113717554 |
| 13 | 113717631 |
| 14 | 113717633 |
| 15 | 113717641 |
| 16 | 113717644 |
| 17 | 113717663 |
| 18 | 113717664 |
| 19 | 113717742 |
| 20 | 113717743 |
| 21 | 113717752 |