A069406 Half the number of n X 6 binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.
31, 1351, 48329, 1565371, 48602431, 1478456575, 44515781333
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.