Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A317453

Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =11a(2) =17a(3) =36a(4) =131a(5) =322a(6) =762a(7) =2337a(8) =6165a(9) =15869a(10) =44914a(11) =121947a(12) =324214a(13) =894468a(14) =2441451a(15) =6589367a(16) =18023035a(17) =49207556a(18) =133636847a(19) =364592196a(20) =994849120a(21) =2708442209a(22) =7384462695a(23) =20140768449a(24) =54883108164a(25) =149619672899a(26) =407984044766

External references