Number of (n+2)X4 binary arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum.

A187933

Number of (n+2)X4 binary arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum.

Terms

    a(0) =44a(1) =104a(2) =704a(3) =2532a(4) =14308a(5) =64024a(6) =328116a(7) =1509288a(8) =7610052a(9) =36481660a(10) =180534736a(11) =869511316a(12) =4284355448a(13) =20864250924a(14) =102391000452a(15) =498989985620

External references