Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

A304955

Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =45a(2) =118a(3) =496a(4) =2080a(5) =8361a(6) =35441a(7) =148491a(8) =621640a(9) =2614631a(10) =10980051a(11) =46108520a(12) =193777385a(13) =814071188a(14) =3420213425a(15) =14370988671a(16) =60379626904a(17) =253690644748

External references