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

A304015

Number of nX4 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) =2a(1) =45a(2) =103a(3) =370a(4) =1318a(5) =4449a(6) =16187a(7) =57097a(8) =204138a(9) =731990a(10) =2619348a(11) =9409831a(12) =33795414a(13) =121433334a(14) =436597037a(15) =1569707036a(16) =5644843684a(17) =20301268685a(18) =73014988681a(19) =262618746090a(20) =944600144394

External references