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 | -2 |
| 3 | 2 |
| 4 | 3 |
| 5 | -4 |
| 6 | -1 |
| 7 | 8 |
| 8 | -1 |
| 9 | -10 |
| 10 | 9 |
| 11 | 16 |
| 12 | -18 |
| 13 | -12 |
| 14 | 42 |
| 15 | 4 |
| 16 | -58 |
| 17 | 40 |
| 18 | 82 |
| 19 | -88 |
| 20 | -54 |
| 21 | 188 |
| 22 | 18 |
| 23 | -248 |
| 24 | 151 |
| 25 | 354 |
| 26 | -338 |
| 27 | -260 |
| 28 | 760 |
| 29 | 120 |
| 30 | -1031 |
| 31 | 574 |
| 32 | 1460 |
| 33 | -1324 |
| 34 | -1076 |
| 35 | 2948 |
| 36 | 542 |
| 37 | -3962 |
| 38 | 2075 |
| 39 | 5644 |
| 40 | -4868 |
| 41 | -4290 |
| 42 | 11035 |
| 43 | 2418 |
| 44 | -14900 |
| 45 | 7346 |
| 46 | 21300 |
| 47 | -17652 |
| 48 | -16323 |
| 49 | 40442 |
| 50 | 9768 |
| 51 | -54476 |
| 52 | 25675 |
| 53 | 78290 |
| 54 | -62456 |