Number of nX4 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically.

A207657

Number of nX4 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically.

Terms

    a(0) =10a(1) =100a(2) =292a(3) =870a(4) =2774a(5) =9060a(6) =30440a(7) =103838a(8) =359206a(9) =1254128a(10) =4412792a(11) =15616086a(12) =55522546a(13) =198135096a(14) =709186104a(15) =2544574170a(16) =9148317066a(17) =32944585328a(18) =118801548180a(19) =428898598218

External references