Number of 4Xn 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 0 1 and 1 0 1 vertically.

A209651

Number of 4Xn 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 0 1 and 1 0 1 vertically.

Terms

    a(0) =8a(1) =64a(2) =216a(3) =630a(4) =2156a(5) =7128a(6) =24990a(7) =87136a(8) =311040a(9) =1112150a(10) =4018716a(11) =14563584a(12) =53065350a(13) =193861408a(14) =710502760a(15) =2609417910a(16) =9603620076a(17) =35401092264a(18) =130688898510a(19) =483039609408

External references