4609920

Appears in sequences

• Number of (n+1) X (1+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings).at n=9A234436
• a(n) = A025487(n) * A324576(n) = A025487(n) * A276086(A025487(n)).at n=17A324577