Number of 3 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 1 vertically.

A207683

Number of 3 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 1 vertically.

Terms

    a(0) =6a(1) =36a(2) =72a(3) =164a(4) =336a(5) =702a(6) =1488a(7) =3164a(8) =6612a(9) =13916a(10) =29532a(11) =62032a(12) =130548a(13) =275904a(14) =581196a(15) =1223824a(16) =2581620a(17) =5442424a(18) =11466060a(19) =24172016a(20) =50959908a(21) =107395128a(22) =226366524a(23) =477188096a(24) =1005780564a(25) =2119935656a(26) =4468615788a(27) =9419000656

External references