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 | 0 |
| 2 | 1 |
| 3 | -3 |
| 4 | 7 |
| 5 | -10 |
| 6 | 13 |
| 7 | -21 |
| 8 | 35 |
| 9 | -39 |
| 10 | 36 |
| 11 | -55 |
| 12 | 85 |
| 13 | -78 |
| 14 | 71 |
| 15 | -118 |
| 16 | 155 |
| 17 | -136 |
| 18 | 130 |
| 19 | -171 |
| 20 | 232 |
| 21 | -234 |
| 22 | 177 |
| 23 | -253 |
| 24 | 389 |
| 25 | -310 |
| 26 | 248 |
| 27 | -390 |
| 28 | 455 |
| 29 | -406 |
| 30 | 378 |
| 31 | -465 |
| 32 | 651 |
| 33 | -586 |
| 34 | 426 |
| 35 | -626 |
| 36 | 832 |
| 37 | -666 |
| 38 | 533 |
| 39 | -822 |
| 40 | 1040 |
| 41 | -820 |
| 42 | 734 |
| 43 | -903 |
| 44 | 1129 |
| 45 | -1144 |
| 46 | 783 |
| 47 | -1081 |
| 48 | 1637 |
| 49 | -1197 |
| 50 | 961 |
| 51 | -1414 |
| 52 | 1580 |
| 53 | -1378 |