Number of nX4 0..1 arrays with every element equal to 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

A298578

Number of nX4 0..1 arrays with every element equal to 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =13a(2) =25a(3) =78a(4) =237a(5) =844a(6) =2551a(7) =7941a(8) =25802a(9) =82080a(10) =258039a(11) =822737a(12) =2628312a(13) =8359547a(14) =26575371a(15) =84674430a(16) =269778131a(17) =858987274a(18) =2735603656a(19) =8714789361a(20) =27760710006a(21) =88426843547a(22) =281688270586a(23) =897368531679

External references