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 | 0 |
| 1 | -1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 0 |
| 6 | -3 |
| 7 | -5 |
| 8 | -1 |
| 9 | 7 |
| 10 | 12 |
| 11 | 3 |
| 12 | -16 |
| 13 | -27 |
| 14 | -7 |
| 15 | 37 |
| 16 | 64 |
| 17 | 20 |
| 18 | -85 |
| 19 | -152 |
| 20 | -55 |
| 21 | 191 |
| 22 | 356 |
| 23 | 141 |
| 24 | -436 |
| 25 | -841 |
| 26 | -364 |
| 27 | 991 |
| 28 | 1988 |
| 29 | 938 |
| 30 | -2233 |
| 31 | -4674 |
| 32 | -2369 |
| 33 | 5044 |
| 34 | 11004 |
| 35 | 5963 |
| 36 | -11361 |
| 37 | -25898 |
| 38 | -14959 |
| 39 | 25467 |
| 40 | 60821 |
| 41 | 37245 |
| 42 | -56995 |
| 43 | -142783 |
| 44 | -92384 |
| 45 | 127136 |
| 46 | 334946 |
| 47 | 228385 |
| 48 | -282392 |