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 | -2 |
| 2 | 1 |
| 3 | -2 |
| 4 | -11 |
| 5 | 1 |
| 6 | -2 |
| 7 | 70 |
| 8 | -26 |
| 9 | 1 |
| 10 | -2 |
| 11 | -362 |
| 12 | 406 |
| 13 | -47 |
| 14 | 1 |
| 15 | -2 |
| 16 | 1663 |
| 17 | -4994 |
| 18 | 1303 |
| 19 | -74 |
| 20 | 1 |
| 21 | -2 |
| 22 | -7085 |
| 23 | 53326 |
| 24 | -27857 |
| 25 | 3166 |
| 26 | -107 |
| 27 | 1 |
| 28 | -2 |
| 29 | 28636 |
| 30 | -518210 |
| 31 | 507958 |
| 32 | -102674 |
| 33 | 6508 |
| 34 | -146 |
| 35 | 1 |
| 36 | -2 |
| 37 | -111332 |
| 38 | 4707262 |
| 39 | -8310026 |
| 40 | 2800366 |
| 41 | -295892 |
| 42 | 11950 |
| 43 | -191 |
| 44 | 1 |
| 45 | -2 |
| 46 | 420109 |
| 47 | -40642370 |
| 48 | 125613106 |
| 49 | -67743506 |
| 50 | 11185858 |
| 51 | -722882 |
| 52 | 20221 |
| 53 | -242 |
| 54 | 1 |