A202818 The left-hand half-triangle of A202691.
1, 1, 0, 2, 3, 3, 8, 6, 3, 0, 40, 48, 54, 57, 57, 256, 216, 168, 114, 57, 0
Offset: 1
Examples
Triangle begins: 1 1 0 2 3 3 8 6 3 0 40 48 54 57 57 256 216 168 114 57 0
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.