Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 king-move adjacent elements, with upper left element zero.

A304351

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =21a(2) =27a(3) =101a(4) =333a(5) =1023a(6) =4370a(7) =19555a(8) =81921a(9) =373236a(10) =1746093a(11) =7958693a(12) =36661588a(13) =170702565a(14) =790337639a(15) =3658576294a(16) =16987088609a(17) =78814582035a(18) =365464383814

External references