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

A297872

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

Terms

    a(0) =0a(1) =2a(2) =3a(3) =10a(4) =20a(5) =68a(6) =185a(7) =561a(8) =1588a(9) =4814a(10) =14322a(11) =42658a(12) =127606a(13) =381695a(14) =1142358a(15) =3419569a(16) =10243325a(17) =30685488a(18) =91937645a(19) =275496007a(20) =825602377a(21) =2474298468a(22) =7415685876a(23) =22226227933a(24) =66617647655a(25) =199673303891a(26) =598488700247

External references