Number of (n+2)X4 binary arrays avoiding patterns 000 and 101 in rows and columns.

A203085

Number of (n+2)X4 binary arrays avoiding patterns 000 and 101 in rows and columns.

Terms

    a(0) =253a(1) =787a(2) =2237a(3) =6615a(4) =19723a(5) =57699a(6) =169561a(7) =500813a(8) =1473813a(9) =4336509a(10) =12776787a(11) =37624405a(12) =110768047a(13) =326202095a(14) =960592477a(15) =2828495527a(16) =8329036847a(17) =24526561909a(18) =72221962493a(19) =212669436487a(20) =626242809531

External references