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 | 1 |
| 2 | 0 |
| 3 | 300 |
| 4 | -1724 |
| 5 | 4926 |
| 6 | 0 |
| 7 | -16600 |
| 8 | 44600 |
| 9 | -100299 |
| 10 | 0 |
| 11 | 534852 |
| 12 | -517200 |
| 13 | -577450 |
| 14 | 0 |
| 15 | 1477800 |
| 16 | 2486626 |
| 17 | -6905550 |
| 18 | 0 |
| 19 | 10661852 |
| 20 | -8492424 |
| 21 | -4980000 |
| 22 | 0 |
| 23 | 18643800 |
| 24 | 13380000 |
| 25 | -25030649 |
| 26 | 0 |
| 27 | -78396200 |
| 28 | 28618400 |
| 29 | 128407302 |
| 30 | 0 |
| 31 | -52842448 |
| 32 | -150834520 |
| 33 | 160455600 |
| 34 | 0 |
| 35 | -81771600 |