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

A303965

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

Terms

    a(0) =5a(1) =21a(2) =26a(3) =73a(4) =173a(5) =374a(6) =842a(7) =1923a(8) =4326a(9) =9786a(10) =22216a(11) =50282a(12) =113823a(13) =257876a(14) =584048a(15) =1322693a(16) =2995970a(17) =6785755a(18) =15368972a(19) =34809869a(20) =78842537a(21) =178572968a(22) =404456933a(23) =916071309a(24) =2074845102a(25) =4699397535a(26) =10643852519a(27) =24107680509a(28) =54602433896

External references