Number of n X 2 0..1 arrays with no 1 adjacent to 3 king-move neighboring 1s.

A297088

Number of n X 2 0..1 arrays with no 1 adjacent to 3 king-move neighboring 1s.

Terms

    a(0) =4a(1) =15a(2) =45a(3) =152a(4) =511a(5) =1681a(6) =5588a(7) =18575a(8) =61621a(9) =204608a(10) =679407a(11) =2255577a(12) =7488924a(13) =24864735a(14) =82554557a(15) =274095080a(16) =910042783a(17) =3021494049a(18) =10031871012a(19) =33307511407a(20) =110586567109a(21) =367166113104

External references