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

A297854

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

Terms

    a(0) =2a(1) =13a(2) =19a(3) =30a(4) =53a(5) =90a(6) =145a(7) =244a(8) =406a(9) =771a(10) =1396a(11) =2472a(12) =4358a(13) =7688a(14) =13953a(15) =25626a(16) =46458a(17) =83576a(18) =150333a(19) =271566a(20) =494639a(21) =900920a(22) =1633015a(23) =2955455a(24) =5353266a(25) =9717165a(26) =17670119a(27) =32099391a(28) =58228907a(29) =105619960

External references