Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.

A305085

Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =33a(2) =34a(3) =91a(4) =352a(5) =372a(6) =1016a(7) =3474a(8) =4945a(9) =13288a(10) =37062a(11) =64155a(12) =165994a(13) =415987a(14) =812826a(15) =2026972a(16) =4818456a(17) =10116447a(18) =24515337a(19) =56876113a(20) =124413665a(21) =295467341a(22) =678580178a(23) =1518490899a(24) =3558083669a(25) =8143158484a(26) =18447074191a(27) =42855072254

External references