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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 0 |
| 6 | -1 |
| 7 | -2 |
| 8 | -3 |
| 9 | -4 |
| 10 | -3 |
| 11 | 0 |
| 12 | 5 |
| 13 | 12 |
| 14 | 21 |
| 15 | 27 |
| 16 | 25 |
| 17 | 10 |
| 18 | -23 |
| 19 | -79 |
| 20 | -149 |
| 21 | -210 |
| 22 | -225 |
| 23 | -143 |
| 24 | 101 |
| 25 | 544 |
| 26 | 1153 |
| 27 | 1783 |
| 28 | 2135 |
| 29 | 1714 |
| 30 | -81 |
| 31 | -3735 |
| 32 | -9263 |
| 33 | -15724 |
| 34 | -20603 |
| 35 | -19490 |
| 36 | -6485 |
| 37 | 24242 |
| 38 | 75307 |
| 39 | 140955 |
| 40 | 200891 |
| 41 | 215530 |
| 42 | 126527 |
| 43 | -132122 |
| 44 | -605687 |