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

Terms

a(0) =6a(1) =36a(2) =102a(3) =289a(4) =612a(5) =1296a(6) =2340a(7) =4225a(8) =6890a(9) =11236a(10) =17066a(11) =25921a(12) =37352a(13) =53824a(14) =74472a(15) =103041a(16) =138030a(17) =184900a(18) =241230a(19) =314721a(20) =401676a(21) =512656a(22) =642252a(23) =804609a(24) =992082a(25) =1223236a(26) =1487570a(27) =1809025a(28) =2173520a(29) =2611456