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) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 4 |
| 3 | 24 |
| 4 | 84 |
| 5 | 224 |
| 6 | 516 |
| 7 | 1068 |
| 8 | 2016 |
| 9 | 3528 |
| 10 | 5832 |
| 11 | 9256 |
| 12 | 14208 |
| 13 | 21180 |
| 14 | 30728 |
| 15 | 43488 |
| 16 | 60192 |
| 17 | 81660 |
| 18 | 108828 |
| 19 | 142764 |
| 20 | 184708 |
| 21 | 236088 |
| 22 | 298476 |
| 23 | 373652 |
| 24 | 463524 |
| 25 | 570228 |
| 26 | 696012 |
| 27 | 843312 |
| 28 | 1014720 |
| 29 | 1213096 |
| 30 | 1441512 |
| 31 | 1703352 |
| 32 | 2002196 |
| 33 | 2341848 |
| 34 | 2726400 |
| 35 | 3160272 |
| 36 | 3648180 |