230621

Appears in sequences

• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1101-0111-0010 pattern in any orientation.at n=15A147245
• Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns.at n=3A221778
• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns.at n=18A221780