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 | -3 |
| 2 | 3 |
| 3 | -13 |
| 4 | 18 |
| 5 | -24 |
| 6 | 21 |
| 7 | -39 |
| 8 | 63 |
| 9 | -68 |
| 10 | 48 |
| 11 | -81 |
| 12 | 127 |
| 13 | -108 |
| 14 | 87 |
| 15 | -170 |
| 16 | 216 |
| 17 | -174 |
| 18 | 156 |
| 19 | -213 |
| 20 | 294 |
| 21 | -302 |
| 22 | 201 |
| 23 | -303 |
| 24 | 497 |
| 25 | -375 |
| 26 | 276 |
| 27 | -474 |
| 28 | 537 |
| 29 | -468 |
| 30 | 426 |
| 31 | -531 |
| 32 | 777 |
| 33 | -686 |
| 34 | 462 |
| 35 | -726 |
| 36 | 965 |
| 37 | -744 |
| 38 | 573 |
| 39 | -938 |
| 40 | 1200 |
| 41 | -906 |
| 42 | 798 |
| 43 | -993 |
| 44 | 1251 |
| 45 | -1306 |
| 46 | 831 |
| 47 | -1179 |
| 48 | 1875 |
| 49 | -1314 |
| 50 | 1023 |
| 51 | -1562 |
| 52 | 1722 |
| 53 | -1488 |
| 54 | 1290 |
| 55 | -1698 |