Number of n X 7 0..1 arrays with every element equal to 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A300349

Number of n X 7 0..1 arrays with every element equal to 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =223a(2) =306a(3) =729a(4) =1496a(5) =3092a(6) =5451a(7) =12038a(8) =22852a(9) =46541a(10) =95132a(11) =196177a(12) =405629a(13) =840634a(14) =1744597a(15) =3623639a(16) =7531533a(17) =15660855a(18) =32571028a(19) =67753153a(20) =140956422a(21) =293282485a(22) =610274374a(23) =1269978478a(24) =2642991878a(25) =5500729098a(26) =11448984844

External references