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 | 1049 |
| 2 | 8812 |
| 3 | 49872 |
| 4 | 217634 |
| 5 | 790734 |
| 6 | 2510004 |
| 7 | 7189937 |
| 8 | 19018266 |
| 9 | 47251067 |
| 10 | 111715980 |
| 11 | 253943272 |
| 12 | 559554564 |
| 13 | 1203154060 |
| 14 | 2538190856 |
| 15 | 5276700889 |
| 16 | 10848708252 |
| 17 | 22120797741 |
| 18 | 44832823100 |
| 19 | 90470607368 |
| 20 | 182010260670 |