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) |
|---|---|
| 3 | 21 |
| 4 | 2919 |
| 5 | 155106 |
| 6 | 6054006 |
| 7 | 208493607 |
| 8 | 6791135085 |
| 9 | 215553311652 |
| 10 | 6758354401932 |
| 11 | 210657488261913 |
| 12 | 6547648042583571 |
| 13 | 203236346721890118 |
| 14 | 6304217491485837378 |
| 15 | 195489116558570607339 |
| 16 | 6061038320388658194777 |
| 17 | 187905324183802270088904 |
| 18 | 5825262097993829801550744 |