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 | 0 |
| 2 | 28 |
| 3 | 132 |
| 4 | 360 |
| 5 | 760 |
| 6 | 1380 |
| 7 | 2268 |
| 8 | 3472 |
| 9 | 5040 |
| 10 | 7020 |
| 11 | 9460 |
| 12 | 12408 |
| 13 | 15912 |
| 14 | 20020 |
| 15 | 24780 |
| 16 | 30240 |
| 17 | 36448 |
| 18 | 43452 |
| 19 | 51300 |
| 20 | 60040 |
| 21 | 69720 |
| 22 | 80388 |
| 23 | 92092 |
| 24 | 104880 |
| 25 | 118800 |
| 26 | 133900 |
| 27 | 150228 |
| 28 | 167832 |
| 29 | 186760 |
| 30 | 207060 |