290493

Appears in sequences

• 1/2 the number of colorings of a 5 X 5 square array with n colors.at n=1A068241
• Coefficient of x^5 in (1-x-x^2)^(-n).at n=26A139798
• Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.at n=3A209504
• Half the number of (n+1) X 5 0..2 arrays with every 2 X 2 subblock having two or four distinct clockwise edge differences.at n=3A209507
• T(n,k)=Half the number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.at n=24A209511