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 | 10 |
| 3 | 72 |
| 4 | 448 |
| 5 | 1450 |
| 6 | 4482 |
| 7 | 10388 |
| 8 | 23552 |
| 9 | 45360 |
| 10 | 86250 |
| 11 | 147620 |
| 12 | 250560 |
| 13 | 395122 |
| 14 | 619458 |
| 15 | 919800 |
| 16 | 1359872 |
| 17 | 1928208 |
| 18 | 2725002 |
| 19 | 3725520 |
| 20 | 5080000 |
| 21 | 6742890 |
| 22 | 8931010 |
| 23 | 11568172 |
| 24 | 14957568 |
| 25 | 18980000 |
| 26 | 24048362 |
| 27 | 29985228 |
| 28 | 37340352 |
| 29 | 45859730 |
| 30 | 56261250 |