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 | 0 |
| 4 | 56 |
| 5 | 200 |
| 6 | 486 |
| 7 | 980 |
| 8 | 1760 |
| 9 | 2916 |
| 10 | 4550 |
| 11 | 6776 |
| 12 | 9720 |
| 13 | 13520 |
| 14 | 18326 |
| 15 | 24300 |
| 16 | 31616 |
| 17 | 40460 |
| 18 | 51030 |
| 19 | 63536 |
| 20 | 78200 |
| 21 | 95256 |
| 22 | 114950 |
| 23 | 137540 |
| 24 | 163296 |
| 25 | 192500 |
| 26 | 225446 |
| 27 | 262440 |
| 28 | 303800 |
| 29 | 349856 |
| 30 | 400950 |