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 | -3 |
| 4 | -1 |
| 5 | 5 |
| 6 | 10 |
| 7 | 9 |
| 8 | -4 |
| 9 | -26 |
| 10 | -43 |
| 11 | -33 |
| 12 | 35 |
| 13 | 148 |
| 14 | 219 |
| 15 | 98 |
| 16 | -316 |
| 17 | -857 |
| 18 | -983 |
| 19 | 23 |
| 20 | 2296 |
| 21 | 4501 |
| 22 | 3712 |
| 23 | -2906 |
| 24 | -14257 |
| 25 | -21771 |
| 26 | -10811 |
| 27 | 28282 |
| 28 | 81209 |
| 29 | 97292 |
| 30 | 7960 |
| 31 | -207185 |
| 32 | -431595 |
| 33 | -386033 |
| 34 | 219344 |
| 35 | 1322141 |
| 36 | 2134126 |
| 37 | 1226554 |
| 38 | -2443765 |
| 39 | -7684081 |
| 40 | -9726127 |
| 41 | -1791806 |
| 42 | 18712361 |
| 43 | 41428590 |
| 44 | 39753658 |