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 | 0 |
| 3 | 4 |
| 4 | 12 |
| 5 | 28 |
| 6 | 60 |
| 7 | 124 |
| 8 | 124 |
| 9 | 124 |
| 10 | 636 |
| 11 | 1660 |
| 12 | 1660 |
| 13 | 1660 |
| 14 | 9852 |
| 15 | 9852 |
| 16 | 9852 |
| 17 | 9852 |
| 18 | 140924 |
| 19 | 140924 |
| 20 | 140924 |
| 21 | 1189500 |
| 22 | 3286652 |
| 23 | 7480956 |
| 24 | 7480956 |
| 25 | 7480956 |
| 26 | 7480956 |
| 27 | 7480956 |
| 28 | 7480956 |
| 29 | 7480956 |
| 30 | 7480956 |
| 31 | 7480956 |
| 32 | 2154964604 |
| 33 | 2154964604 |
| 34 | 2154964604 |
| 35 | 19334833788 |