Number of (n+2) X 4 binary arrays avoiding patterns 000 and 011 in rows, columns and nw-to-se diagonals.

A202771

Number of (n+2) X 4 binary arrays avoiding patterns 000 and 011 in rows, columns and nw-to-se diagonals.

Terms

    a(0) =201a(1) =550a(2) =1239a(3) =2600a(4) =5330a(5) =10322a(6) =19712a(7) =36877a(8) =67818a(9) =123780a(10) =223588a(11) =401471a(12) =717459a(13) =1276509a(14) =2265021a(15) =4008850a(16) =7081983a(17) =12493424a(18) =22013308a(19) =38753966a(20) =68177210a(21) =119873325a(22) =210680744a(23) =370151150a(24) =650162408a(25) =1141764563a(26) =2004758257

External references