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

A298135

Number of nX4 0..1 arrays with every element equal to 2, 3, 5 or 7 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) =1600a(9) =4856a(10) =14490a(11) =43334a(12) =130046a(13) =390291a(14) =1172586a(15) =3523139a(16) =10593181a(17) =31854446a(18) =95807649a(19) =288198019a(20) =867005085a(21) =2608469794a(22) =7848188504a(23) =23614061363a(24) =71053102045a(25) =213798191069a(26) =643325960937

External references