Number of n X 4 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.

Terms

a(0) =9a(1) =81a(2) =288a(3) =720a(4) =1485a(5) =2709a(6) =4536a(7) =7128a(8) =10665a(9) =15345a(10) =21384a(11) =29016a(12) =38493a(13) =50085a(14) =64080a(15) =80784a(16) =100521a(17) =123633a(18) =150480a(19) =181440a(20) =216909a(21) =257301a(22) =303048a(23) =354600a(24) =412425a(25) =477009a(26) =548856a(27) =628488a(28) =716445a(29) =813285