Number of nX2 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A300500

Number of nX2 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =3a(2) =2a(3) =3a(4) =6a(5) =6a(6) =11a(7) =26a(8) =43a(9) =82a(10) =178a(11) =347a(12) =682a(13) =1403a(14) =2822a(15) =5638a(16) =11411a(17) =23026a(18) =46291a(19) =93346a(20) =188258a(21) =379187a(22) =764178a(23) =1540467a(24) =3104262a(25) =6255878a(26) =12608667a(27) =25410698a(28) =51210491a(29) =103208946

External references