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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | -6 |
| 5 | 1 |
| 6 | 1 |
| 7 | 43 |
| 8 | 43 |
| 9 | 1 |
| 10 | 1 |
| 11 | -300 |
| 12 | 2150 |
| 13 | -300 |
| 14 | 1 |
| 15 | 1 |
| 16 | 2101 |
| 17 | 105050 |
| 18 | 105050 |
| 19 | 2101 |
| 20 | 1 |
| 21 | 1 |
| 22 | -14706 |
| 23 | 5149551 |
| 24 | -35927100 |
| 25 | 5149551 |
| 26 | -14706 |
| 27 | 1 |
| 28 | 1 |
| 29 | 102943 |
| 30 | 252313293 |
| 31 | 12328144851 |
| 32 | 12328144851 |
| 33 | 252313293 |
| 34 | 102943 |
| 35 | 1 |
| 36 | 1 |
| 37 | -720600 |
| 38 | 12363454300 |