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 | -10 |
| 3 | 1 |
| 4 | 200 |
| 5 | -30 |
| 6 | 1 |
| 7 | -6000 |
| 8 | 1100 |
| 9 | -60 |
| 10 | 1 |
| 11 | 240000 |
| 12 | -50000 |
| 13 | 3500 |
| 14 | -100 |
| 15 | 1 |
| 16 | -12000000 |
| 17 | 2740000 |
| 18 | -225000 |
| 19 | 8500 |
| 20 | -150 |
| 21 | 1 |
| 22 | 720000000 |
| 23 | -176400000 |
| 24 | 16240000 |
| 25 | -735000 |
| 26 | 17500 |
| 27 | -210 |
| 28 | 1 |
| 29 | -50400000000 |
| 30 | 13068000000 |
| 31 | -1313200000 |
| 32 | 67690000 |
| 33 | -1960000 |
| 34 | 32200 |
| 35 | -280 |
| 36 | 1 |
| 37 | 4032000000000 |
| 38 | -1095840000000 |