Number of nX4 0..1 arrays with every element equal to 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.

A298051

Number of nX4 0..1 arrays with every element equal to 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =13a(2) =19a(3) =40a(4) =73a(5) =141a(6) =240a(7) =428a(8) =779a(9) =1531a(10) =2989a(11) =5729a(12) =10760a(13) =20205a(14) =38568a(15) =74861a(16) =144345a(17) =276668a(18) =528526a(19) =1012806a(20) =1946937a(21) =3753744a(22) =7220044a(23) =13870376a(24) =26646526a(25) =51244788a(26) =98611858a(27) =189814459a(28) =365167476a(29) =702384337

External references