Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3 or 8 king-move adjacent elements, with upper left element zero.

A305226

Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =49a(2) =54a(3) =116a(4) =253a(5) =541a(6) =1248a(7) =2831a(8) =6471a(9) =14788a(10) =33887a(11) =77571a(12) =177642a(13) =406875a(14) =931841a(15) =2134242a(16) =4888087a(17) =11195485a(18) =25641380a(19) =58727691a(20) =134506571a(21) =308066476a(22) =705578355a(23) =1616017727a(24) =3701237834a(25) =8477110559a(26) =19415506245a(27) =44468203154

External references