Number of nX3 0..1 arrays with every element equal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

A297910

Number of nX3 0..1 arrays with every element equal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =12a(2) =10a(3) =49a(4) =144a(5) =481a(6) =2016a(7) =7730a(8) =30637a(9) =122459a(10) =486274a(11) =1937553a(12) =7719764a(13) =30746715a(14) =122495655a(15) =487999537a(16) =1944079833a(17) =7744935218a(18) =30854501570a(19) =122919184440a(20) =489690085219

External references