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

A207747

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

Terms

    a(0) =6a(1) =36a(2) =102a(3) =270a(4) =798a(5) =2354a(6) =7210a(7) =22232a(8) =69570a(9) =218950a(10) =693810a(11) =2207142a(12) =7047274a(13) =22559004a(14) =72371822a(15) =232562110a(16) =748347990a(17) =2410664906a(18) =7772348106a(19) =25076879856a(20) =80954866538a(21) =261464311606a(22) =844780530762

External references