220728

Appears in sequences

• Number of nonnegative integer arrays of length n summing to n without equal adjacent values modulo 5.at n=14A221318
• Number of (n+1)X(3+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=13A253693