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 | 48 |
| 2 | 0 |
| 3 | 238 |
| 4 | -480 |
| 5 | 0 |
| 6 | 1679 |
| 7 | 1680 |
| 8 | 0 |
| 9 | 2162 |
| 10 | -1440 |
| 11 | 0 |
| 12 | 2401 |
| 13 | -5040 |
| 14 | 0 |
| 15 | -6958 |
| 16 | 11424 |
| 17 | 0 |
| 18 | -1442 |
| 19 | 0 |
| 20 | 0 |
| 21 | -23040 |
| 22 | -12480 |
| 23 | 0 |
| 24 | 1918 |
| 25 | -7920 |
| 26 | 0 |
| 27 | -9362 |
| 28 | 6720 |
| 29 | 0 |
| 30 | 14641 |
| 31 | 50592 |
| 32 | 0 |
| 33 | 0 |
| 34 | -36960 |
| 35 | 0 |
| 36 | 80640 |
| 37 | -28560 |
| 38 | 0 |
| 39 | -20398 |
| 40 | 0 |
| 41 | 0 |
| 42 | 28083 |
| 43 | -34320 |
| 44 | 0 |
| 45 | 64078 |
| 46 | 103776 |
| 47 | 0 |
| 48 | -38398 |