Number of (n+1) X (4+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings).

A235294

Number of (n+1) X (4+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings).

Terms

    a(0) =744a(1) =1132a(2) =1736a(3) =3184a(4) =5784a(5) =12328a(6) =25592a(7) =60856a(8) =138744a(9) =356632a(10) =864056a(11) =2342104a(12) =5889144a(13) =16525528a(14) =42475832a(15) =121851736a(16) =317293944a(17) =923151832a(18) =2422801976a(19) =7113966424a(20) =18762768504a(21) =55430893528a(22) =146666831672a(23) =435125968216

External references