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) |
|---|---|
| 7 | 1 |
| 8 | -7 |
| 9 | 21 |
| 10 | -35 |
| 11 | 28 |
| 12 | 21 |
| 13 | -105 |
| 14 | 181 |
| 15 | -189 |
| 16 | 77 |
| 17 | 140 |
| 18 | -385 |
| 19 | 546 |
| 20 | -511 |
| 21 | 252 |
| 22 | 203 |
| 23 | -693 |
| 24 | 1029 |
| 25 | -1092 |
| 26 | 798 |
| 27 | -203 |
| 28 | -581 |
| 29 | 1281 |
| 30 | -1708 |
| 31 | 1687 |
| 32 | -1232 |
| 33 | 413 |
| 34 | 602 |
| 35 | -1485 |
| 36 | 2233 |
| 37 | -2366 |
| 38 | 2009 |
| 39 | -1099 |
| 40 | 14 |
| 41 | 1099 |
| 42 | -2072 |
| 43 | 2667 |
| 44 | -2807 |
| 45 | 2254 |
| 46 | -1477 |
| 47 | 0 |
| 48 | 1057 |
| 49 | -2346 |
| 50 | 2744 |
| 51 | -3017 |
| 52 | 2457 |