1092268domain: NAppears in sequencesNumber of (n+1) X (1+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=15A234875a(n) = [x^n] Product_{k>=1} 1/(1 - x^(k*(k+1)/2))^n.at n=11A301458