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

A304948

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

Terms

    a(0) =1a(1) =13a(2) =21a(3) =26a(4) =70a(5) =139a(6) =287a(7) =625a(8) =1484a(9) =3197a(10) =7321a(11) =17097a(12) =38454a(13) =89084a(14) =206798a(15) =474945a(16) =1101200a(17) =2553611a(18) =5907111a(19) =13701807a(20) =31776804a(21) =73676950a(22) =170939314a(23) =396615800a(24) =920204959a(25) =2135416683a(26) =4955594995a(27) =11500595479a(28) =26691033523

External references