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 | 20 |
| 4 | 108 |
| 5 | 336 |
| 6 | 800 |
| 7 | 1620 |
| 8 | 2940 |
| 9 | 4928 |
| 10 | 7776 |
| 11 | 11700 |
| 12 | 16940 |
| 13 | 23760 |
| 14 | 32448 |
| 15 | 43316 |
| 16 | 56700 |
| 17 | 72960 |
| 18 | 92480 |
| 19 | 115668 |
| 20 | 142956 |
| 21 | 174800 |
| 22 | 211680 |
| 23 | 254100 |
| 24 | 302588 |
| 25 | 357696 |
| 26 | 420000 |
| 27 | 490100 |
| 28 | 568620 |
| 29 | 656208 |
| 30 | 753536 |
| 31 | 861300 |
| 32 | 980220 |
| 33 | 1111040 |
| 34 | 1254528 |