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) |
|---|---|
| 5 | 150 |
| 6 | 960 |
| 7 | 3605 |
| 8 | 10360 |
| 9 | 25200 |
| 10 | 54600 |
| 11 | 108570 |
| 12 | 201960 |
| 13 | 356070 |
| 14 | 600600 |
| 15 | 975975 |
| 16 | 1536080 |
| 17 | 2351440 |
| 18 | 3512880 |
| 19 | 5135700 |
| 20 | 7364400 |
| 21 | 10377990 |
| 22 | 14395920 |
| 23 | 19684665 |
| 24 | 26565000 |
| 25 | 35420000 |
| 26 | 46703800 |
| 27 | 60951150 |
| 28 | 78787800 |
| 29 | 100941750 |
| 30 | 128255400 |