Number of nX7 0..4 arrays with each element equal to the number its horizontal and vertical neighbors equal to 2.

A197060

Number of nX7 0..4 arrays with each element equal to the number its horizontal and vertical neighbors equal to 2.

Terms

    a(0) =1a(1) =10a(2) =38a(3) =93a(4) =200a(5) =547a(6) =1685a(7) =4932a(8) =13343a(9) =35901a(10) =99603a(11) =280909a(12) =785677a(13) =2175329a(14) =6019355a(15) =16730920a(16) =46595762a(17) =129615164a(18) =360051905a(19) =1000167816a(20) =2780017546a(21) =7729131408a(22) =21485039780a(23) =59712094301a(24) =165955469526a(25) =461272868992

External references