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 | 15643 |
| 2 | 1239911 |
| 3 | 3712769 |
| 4 | 14255963 |
| 5 | 101001041 |
| 6 | 504418823 |
| 7 | 595289339 |
| 8 | 738356401 |
| 9 | 885318983 |
| 10 | 1034893493 |
| 11 | 1120883653 |
| 12 | 1217022481 |
| 13 | 1288478701 |
| 14 | 1429102277 |
| 15 | 2779573231 |
| 16 | 3989869253 |
| 17 | 4873949893 |
| 18 | 5285087837 |
| 19 | 6550772831 |
| 20 | 8355641813 |