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

A207678

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

Terms

    a(0) =9a(1) =81a(2) =164a(3) =436a(4) =1030a(5) =2032a(6) =4174a(7) =8266a(8) =16060a(9) =30670a(10) =57888a(11) =109188a(12) =202628a(13) =375252a(14) =692182a(15) =1267634a(16) =2319308a(17) =4224978a(18) =7679364a(19) =13935174a(20) =25221442a(21) =45611766a(22) =82350810a(23) =148518712a(24) =267668550a(25) =481894280a(26) =867169926a(27) =1559501878a(28) =2803131788

External references