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 | -4 |
| 1 | 5 |
| 2 | -7 |
| 3 | 9 |
| 4 | -10 |
| 5 | 10 |
| 6 | -10 |
| 7 | 12 |
| 8 | -16 |
| 9 | 20 |
| 10 | -21 |
| 11 | 20 |
| 12 | -20 |
| 13 | 24 |
| 14 | -30 |
| 15 | 36 |
| 16 | -39 |
| 17 | 40 |
| 18 | -40 |
| 19 | 45 |
| 20 | -54 |
| 21 | 64 |
| 22 | -67 |
| 23 | 68 |
| 24 | -70 |
| 25 | 81 |
| 26 | -94 |
| 27 | 109 |
| 28 | -115 |
| 29 | 120 |
| 30 | -121 |
| 31 | 135 |
| 32 | -152 |
| 33 | 177 |
| 34 | -185 |
| 35 | 195 |
| 36 | -199 |
| 37 | 227 |
| 38 | -249 |
| 39 | 285 |
| 40 | -294 |
| 41 | 315 |
| 42 | -315 |
| 43 | 357 |
| 44 | -385 |
| 45 | 447 |
| 46 | -455 |
| 47 | 495 |
| 48 | -492 |
| 49 | 565 |
| 50 | -590 |
| 51 | 685 |
| 52 | -685 |
| 53 | 764 |
| 54 | -745 |
| 55 | 866 |
| 56 | -883 |
| 57 | 1047 |
| 58 | -1021 |
| 59 | 1160 |