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 | 56 |
| 4 | 1044 |
| 5 | 6632 |
| 6 | 26172 |
| 7 | 78536 |
| 8 | 196916 |
| 9 | 434584 |
| 10 | 871612 |
| 11 | 1622552 |
| 12 | 2845076 |
| 13 | 4749576 |
| 14 | 7609724 |
| 15 | 11773992 |
| 16 | 17678132 |
| 17 | 25858616 |
| 18 | 36967036 |
| 19 | 51785464 |
| 20 | 71242772 |
| 21 | 96431912 |
| 22 | 128628156 |
| 23 | 169308296 |
| 24 | 220170804 |
| 25 | 283156952 |
| 26 | 360472892 |
| 27 | 454612696 |
| 28 | 568382356 |
| 29 | 704924744 |