Number of 4Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A303042

Number of 4Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =10a(2) =35a(3) =74a(4) =234a(5) =869a(6) =2926a(7) =8500a(8) =27931a(9) =96592a(10) =325288a(11) =1051261a(12) =3506796a(13) =11931140a(14) =40248675a(15) =134258666a(16) =451774036a(17) =1530339997a(18) =5170509004a(19) =17416735952a(20) =58815737695a(21) =199037081262a(22) =673067713068

External references