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 | 561 |
| 2 | 84350561 |
| 3 | 851703301 |
| 4 | 2436691321 |
| 5 | 34138047673 |
| 6 | 60246018673 |
| 7 | 63280622521 |
| 8 | 83946864769 |
| 9 | 110296864801 |
| 10 | 114919915021 |
| 11 | 155999871721 |
| 12 | 225593397919 |
| 13 | 342267565249 |
| 14 | 534919693681 |
| 15 | 660950414671 |
| 16 | 733547013841 |
| 17 | 1079942171239 |
| 18 | 1301203515361 |
| 19 | 1333189866793 |