Number of (n+2) X 3 binary arrays avoiding patterns 000 and 001 in rows, columns and nw-to-se diagonals.

A202428

Number of (n+2) X 3 binary arrays avoiding patterns 000 and 001 in rows, columns and nw-to-se diagonals.

Terms

    a(0) =108a(1) =390a(2) =1344a(3) =4680a(4) =16254a(5) =56508a(6) =196350a(7) =682452a(8) =2371680a(9) =8242608a(10) =28645968a(11) =99555660a(12) =345992850a(13) =1202454762a(14) =4178979168a(15) =14523514614a(16) =50474639160a(17) =175418231664a(18) =609643897626

External references