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

A304259

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

Terms

    a(0) =0a(1) =9a(2) =13a(3) =19a(4) =47a(5) =88a(6) =181a(7) =376a(8) =878a(9) =2001a(10) =4424a(11) =10341a(12) =22952a(13) =52556a(14) =120613a(15) =274291a(16) =628125a(17) =1438641a(18) =3287013a(19) =7536973a(20) =17256538a(21) =39516094a(22) =90565077a(23) =207484145a(24) =475398131a(25) =1089513951a(26) =2496621606a(27) =5721591782a(28) =13112958593a(29) =30051839551

External references