421450

Appears in sequences

• Number of n X n binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.at n=4A268988
• Number of nX5 binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.at n=4A268992
• T(n,k)=Number of nXk binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.at n=40A268995
• Number of 5Xn binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.at n=4A268999