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 | 0 |
| 3 | 6 |
| 4 | 208 |
| 5 | 1300 |
| 6 | 4908 |
| 7 | 14112 |
| 8 | 34112 |
| 9 | 73008 |
| 10 | 142700 |
| 11 | 259908 |
| 12 | 447312 |
| 13 | 734812 |
| 14 | 1160908 |
| 15 | 1774200 |
| 16 | 2635008 |
| 17 | 3817112 |
| 18 | 5409612 |
| 19 | 7518908 |
| 20 | 10270800 |
| 21 | 13812708 |
| 22 | 18316012 |
| 23 | 23978512 |
| 24 | 31027008 |
| 25 | 39720000 |
| 26 | 50350508 |
| 27 | 63249012 |
| 28 | 78786512 |
| 29 | 97377708 |
| 30 | 119484300 |
| 31 | 145618408 |