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 | 1 |
| 1 | 0 |
| 2 | 12 |
| 3 | 12 |
| 4 | 72 |
| 5 | 120 |
| 6 | 352 |
| 7 | 600 |
| 8 | 1392 |
| 9 | 2212 |
| 10 | 4272 |
| 11 | 6480 |
| 12 | 10868 |
| 13 | 15396 |
| 14 | 23784 |
| 15 | 31712 |
| 16 | 45708 |
| 17 | 59184 |
| 18 | 81172 |
| 19 | 101928 |
| 20 | 136752 |
| 21 | 167864 |
| 22 | 218712 |
| 23 | 266112 |
| 24 | 339364 |
| 25 | 403680 |
| 26 | 509664 |
| 27 | 597060 |
| 28 | 736416 |
| 29 | 856236 |
| 30 | 1043032 |
| 31 | 1186860 |
| 32 | 1438416 |
| 33 | 1627216 |
| 34 | 1935936 |
| 35 | 2181840 |