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

A207724

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

Terms

    a(0) =6a(1) =36a(2) =78a(3) =189a(4) =490a(5) =1113a(6) =2449a(7) =5474a(8) =12036a(9) =26100a(10) =56595a(11) =122472a(12) =264061a(13) =568695a(14) =1224190a(15) =2633000a(16) =5660226a(17) =12165489a(18) =26141850a(19) =56165805a(20) =120662377a(21) =259206930a(22) =556801480a(23) =1196027864a(24) =2569059663a(25) =5518244160a(26) =11852866905a(27) =25459111647

External references