311144

Appears in sequences

• Number of nX4 binary arrays with every one adjacent to another one horizontally or vertically.at n=4A202798
• Number of nX5 binary arrays with every one adjacent to another one horizontally or vertically.at n=3A202799
• T(n,k) = Number of n X k binary arrays with every one adjacent to another one horizontally or vertically.at n=31A202802
• T(n,k) = Number of n X k binary arrays with every one adjacent to another one horizontally or vertically.at n=32A202802
• Irregular triangle read by rows: T(n,k) = number of size k subsets of S_n that remain unchanged by a rotation of 180 degrees.at n=46A277083