Number of (n+1)X(4+1) 0..2 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

A237633

Number of (n+1)X(4+1) 0..2 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

Terms

    a(0) =1786a(1) =2356a(2) =1488a(3) =2012a(4) =2816a(5) =4440a(6) =5976a(7) =10104a(8) =14168a(9) =22294a(10) =29908a(11) =50502a(12) =70828a(13) =111468a(14) =149540a(15) =252510a(16) =354140a(17) =557340a(18) =747700a(19) =1262550a(20) =1770700a(21) =2786700a(22) =3738500a(23) =6312750a(24) =8853500a(25) =13933500a(26) =18692500a(27) =31563750a(28) =44267500a(29) =69667500

External references