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 | 432 |
| 3 | 1824 |
| 4 | 8100 |
| 5 | 21280 |
| 6 | 46030 |
| 7 | 95904 |
| 8 | 185276 |
| 9 | 265120 |
| 10 | 509976 |
| 11 | 735200 |
| 12 | 1031016 |
| 13 | 1555200 |
| 14 | 2311880 |
| 15 | 2645984 |
| 16 | 4216860 |
| 17 | 5200000 |
| 18 | 6396192 |
| 19 | 8592480 |
| 20 | 11519624 |
| 21 | 12022560 |
| 22 | 17652168 |
| 23 | 20269184 |
| 24 | 23363450 |
| 25 | 29522880 |
| 26 | 37500080 |
| 27 | 37249728 |
| 28 | 52312392 |
| 29 | 57561120 |
| 30 | 63690384 |