Number of 3Xn 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.

A207070

Number of 3Xn 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.

Terms

    a(0) =6a(1) =36a(2) =102a(3) =288a(4) =896a(5) =2499a(6) =6634a(7) =17848a(8) =47192a(9) =122200a(10) =315315a(11) =809784a(12) =2063670a(13) =5238225a(14) =13261490a(15) =33465000a(16) =84237826a(17) =211676500a(18) =531027000a(19) =1330245423a(20) =3328592562a(21) =8320844952a(22) =20782671568a(23) =51871277456a(24) =129387019195a(25) =322571437760

External references