Number of n X 2 0..1 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors.

A231509

Number of n X 2 0..1 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors.

Terms

    a(0) =2a(1) =6a(2) =14a(3) =35a(4) =90a(5) =225a(6) =569a(7) =1441a(8) =3640a(9) =9208a(10) =23293a(11) =58912a(12) =149023a(13) =376961a(14) =953533a(15) =2412030a(16) =6101388a(17) =15433867a(18) =39041066a(19) =98757133a(20) =249813189a(21) =631920345a(22) =1598487728a(23) =4043489236a(24) =10228295949a(25) =25873208028a(26) =65448135355a(27) =165555752805

External references