A171659 Lucas-version of A165293.
2, 10, -2, 100, -30, 2, 1000, -400, 50, -2, 10000, -5000, 900, -70, 2, 100000, -60000, 14000, -1600, 90, -2
Offset: 1
Examples
Triangle begins: 2 10,-2 100,-30,2 1000,-400,50,-2
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.