Number of 4Xn 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302682
Number of 4Xn 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =6a(2) =7a(3) =20a(4) =30a(5) =76a(6) =217a(7) =509a(8) =1189a(9) =3034a(10) =7569a(11) =18274a(12) =44932a(13) =111561a(14) =274057a(15) =672217a(16) =1657278a(17) =4083105a(18) =10038822a(19) =24702412a(20) =60827449a(21) =149699125a(22) =368356029a(23) =906653234a(24) =2231584641a(25) =5492001706a(26) =13516457764a(27) =33267138281a(28) =81875898241
External references
- oeis: A302682