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 | -6 |
| 2 | 9 |
| 3 | 10 |
| 4 | -30 |
| 5 | 0 |
| 6 | 12 |
| 7 | 36 |
| 8 | 9 |
| 9 | -60 |
| 10 | -12 |
| 11 | -54 |
| 12 | 62 |
| 13 | 120 |
| 14 | 18 |
| 15 | -72 |
| 16 | -102 |
| 17 | -54 |
| 18 | -36 |
| 19 | 156 |
| 20 | 108 |
| 21 | 48 |
| 22 | -192 |
| 23 | -108 |
| 24 | 156 |
| 25 | 78 |
| 26 | 126 |
| 27 | -206 |
| 28 | -324 |
| 29 | -72 |
| 30 | 240 |
| 31 | 324 |
| 32 | 225 |
| 33 | -168 |
| 34 | -276 |
| 35 | -180 |
| 36 | 132 |
| 37 | 264 |
| 38 | 72 |
| 39 | -144 |
| 40 | -588 |
| 41 | -198 |
| 42 | 240 |
| 43 | 804 |
| 44 | 270 |
| 45 | -288 |
| 46 | -312 |
| 47 | -324 |
| 48 | 206 |
| 49 | 486 |
| 50 | 225 |
| 51 | -528 |