Number of 2 X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A302279

Number of 2 X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =3a(2) =7a(3) =10a(4) =27a(5) =45a(6) =98a(7) =193a(8) =379a(9) =778a(10) =1523a(11) =3085a(12) =6138a(13) =12281a(14) =24603a(15) =49106a(16) =98363a(17) =196557a(18) =393234a(19) =786481a(20) =1572731a(21) =3145946a(22) =6291203a(23) =12583117a(24) =25165802a(25) =50331369a(26) =100663963a(27) =201325602a(28) =402654283a(29) =805305613

External references