24095475

Appears in sequences

• a(n) = 9*a(n-1) - 6*a(n-2), with a(0)=0, a(1)=1.at n=9A190983
• Number of (n+1)X(7+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements.at n=0A251248
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements.at n=21A251249