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 | -1 |
| 2 | 0 |
| 3 | 2 |
| 4 | -2 |
| 5 | -1 |
| 6 | 4 |
| 7 | -4 |
| 8 | -1 |
| 9 | 8 |
| 10 | -8 |
| 11 | -2 |
| 12 | 14 |
| 13 | -14 |
| 14 | -4 |
| 15 | 24 |
| 16 | -23 |
| 17 | -6 |
| 18 | 40 |
| 19 | -38 |
| 20 | -10 |
| 21 | 63 |
| 22 | -60 |
| 23 | -16 |
| 24 | 98 |
| 25 | -92 |
| 26 | -24 |
| 27 | 150 |
| 28 | -140 |
| 29 | -36 |
| 30 | 224 |
| 31 | -208 |
| 32 | -54 |
| 33 | 329 |
| 34 | -304 |
| 35 | -78 |
| 36 | 478 |
| 37 | -440 |
| 38 | -112 |
| 39 | 684 |
| 40 | -627 |
| 41 | -160 |
| 42 | 968 |
| 43 | -884 |
| 44 | -224 |
| 45 | 1358 |
| 46 | -1236 |
| 47 | -312 |
| 48 | 1884 |
| 49 | -1710 |
| 50 | -432 |
| 51 | 2592 |
| 52 | -2346 |
| 53 | -590 |
| 54 | 3540 |
| 55 | -3196 |
| 56 | -801 |
| 57 | 4796 |
| 58 | -4320 |
| 59 | -1082 |
| 60 | 6454 |