A163010 Number of nX10 binary arrays with all 1s connected and a path of 1s from upper left corner to lower right corner.
1, 4059, 3960215, 2514035445, 1408344201283, 759343825445905
Offset: 1
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.