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 | 3108 |
| 5 | 45960 |
| 6 | 219432 |
| 7 | 609070 |
| 8 | 1243461 |
| 9 | 2111652 |
| 10 | 3201436 |
| 11 | 4508924 |
| 12 | 6034116 |
| 13 | 7777012 |
| 14 | 9737612 |
| 15 | 11915916 |
| 16 | 14311924 |
| 17 | 16925636 |
| 18 | 19757052 |
| 19 | 22806172 |
| 20 | 26072996 |
| 21 | 29557524 |
| 22 | 33259756 |
| 23 | 37179692 |
| 24 | 41317332 |
| 25 | 45672676 |
| 26 | 50245724 |
| 27 | 55036476 |
| 28 | 60044932 |