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 | 105 |
| 3 | 880 |
| 4 | 3465 |
| 5 | 9576 |
| 6 | 21505 |
| 7 | 42120 |
| 8 | 74865 |
| 9 | 123760 |
| 10 | 193401 |
| 11 | 288960 |
| 12 | 416185 |
| 13 | 581400 |
| 14 | 791505 |
| 15 | 1053976 |
| 16 | 1376865 |
| 17 | 1768800 |
| 18 | 2238985 |
| 19 | 2797200 |
| 20 | 3453801 |
| 21 | 4219720 |
| 22 | 5106465 |
| 23 | 6126120 |
| 24 | 7291345 |
| 25 | 8615376 |
| 26 | 10112025 |
| 27 | 11795680 |
| 28 | 13681305 |
| 29 | 15784440 |
| 30 | 18121201 |
| 31 | 20708280 |
| 32 | 23562945 |