Half the number of nX1 0..2 arrays with no element equal to the sum mod 3 of its horizontal and vertical neighbors.

A183494

Half the number of nX1 0..2 arrays with no element equal to the sum mod 3 of its horizontal and vertical neighbors.

Terms

    a(0) =1a(1) =3a(2) =4a(3) =8a(4) =18a(5) =32a(6) =64a(7) =132a(8) =256a(9) =512a(10) =1032a(11) =2048a(12) =4096a(13) =8208a(14) =16384a(15) =32768a(16) =65568a(17) =131072a(18) =262144a(19) =524352a(20) =1048576a(21) =2097152a(22) =4194432a(23) =8388608a(24) =16777216a(25) =33554688a(26) =67108864a(27) =134217728a(28) =268435968a(29) =536870912

External references