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 | 35 |
| 4 | 350 |
| 5 | 1890 |
| 6 | 7350 |
| 7 | 23100 |
| 8 | 62370 |
| 9 | 150150 |
| 10 | 330330 |
| 11 | 675675 |
| 12 | 1301300 |
| 13 | 2382380 |
| 14 | 4176900 |
| 15 | 7054320 |
| 16 | 11531100 |
| 17 | 18314100 |
| 18 | 28352940 |
| 19 | 42902475 |
| 20 | 63596610 |
| 21 | 92534750 |
| 22 | 132382250 |
| 23 | 186486300 |
| 24 | 259008750 |
| 25 | 355077450 |
| 26 | 480957750 |
| 27 | 644245875 |