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 | 50 |
| 2 | 2500 |
| 3 | 61733 |
| 4 | 916107 |
| 5 | 9478535 |
| 6 | 74824917 |
| 7 | 477860225 |
| 8 | 2571238699 |
| 9 | 12006271464 |
| 10 | 49749360288 |
| 11 | 186123469150 |
| 12 | 637408917764 |
| 13 | 2020521264556 |
| 14 | 5982701793264 |
| 15 | 16672986760595 |
| 16 | 44013068603319 |
| 17 | 110650947588800 |
| 18 | 266164581427718 |