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 | 0 |
| 2 | -1 |
| 3 | -2 |
| 4 | -3 |
| 5 | -2 |
| 6 | -1 |
| 7 | 4 |
| 8 | 8 |
| 9 | 14 |
| 10 | 17 |
| 11 | 18 |
| 12 | 9 |
| 13 | -4 |
| 14 | -27 |
| 15 | -58 |
| 16 | -88 |
| 17 | -114 |
| 18 | -122 |
| 19 | -106 |
| 20 | -48 |
| 21 | 48 |
| 22 | 200 |
| 23 | 376 |
| 24 | 577 |
| 25 | 746 |
| 26 | 862 |
| 27 | 840 |
| 28 | 646 |
| 29 | 208 |
| 30 | -486 |
| 31 | -1450 |
| 32 | -2622 |
| 33 | -3888 |
| 34 | -5086 |
| 35 | -5950 |
| 36 | -6204 |
| 37 | -5492 |
| 38 | -3547 |
| 39 | -44 |
| 40 | 5036 |
| 41 | 11732 |
| 42 | 19582 |
| 43 | 28034 |
| 44 | 35932 |
| 45 | 42042 |
| 46 | 44519 |
| 47 | 41660 |
| 48 | 31450 |
| 49 | 12382 |
| 50 | -16721 |