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 | -2 |
| 2 | -2 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | -1 |
| 7 | -2 |
| 8 | -10 |
| 9 | -14 |
| 10 | -7 |
| 11 | -2 |
| 12 | 11 |
| 13 | 26 |
| 14 | 43 |
| 15 | 30 |
| 16 | 28 |
| 17 | -6 |
| 18 | -40 |
| 19 | -92 |
| 20 | -128 |
| 21 | -132 |
| 22 | -115 |
| 23 | -48 |
| 24 | 54 |
| 25 | 200 |
| 26 | 339 |
| 27 | 484 |
| 28 | 499 |
| 29 | 476 |
| 30 | 274 |
| 31 | -32 |
| 32 | -501 |
| 33 | -998 |
| 34 | -1539 |
| 35 | -1924 |
| 36 | -2042 |
| 37 | -1838 |
| 38 | -1139 |
| 39 | 12 |
| 40 | 1664 |
| 41 | 3540 |
| 42 | 5588 |
| 43 | 7258 |
| 44 | 8392 |
| 45 | 8230 |
| 46 | 6812 |
| 47 | 3480 |
| 48 | -1472 |
| 49 | -8150 |
| 50 | -15737 |
| 51 | -23670 |
| 52 | -30478 |