Number of nX2 0..1 arrays with every element unequal to 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

A304013

Number of nX2 0..1 arrays with every element unequal to 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =7a(2) =16a(3) =45a(4) =120a(5) =333a(6) =928a(7) =2613a(8) =7400a(9) =21053a(10) =60080a(11) =171845a(12) =492280a(13) =1411789a(14) =4051904a(15) =11635413a(16) =33424648a(17) =96042845a(18) =276020944a(19) =793366629a(20) =2280573208a(21) =6556026349a(22) =18847591392a(23) =54185601013a(24) =155783294760a(25) =447882509949

External references