Number of (n+4)X7 binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2X2 blocks of 1s.

A183460

Number of (n+4)X7 binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2X2 blocks of 1s.

Terms

    a(0) =2a(1) =11a(2) =32a(3) =69a(4) =498a(5) =1621a(6) =4364a(7) =30246a(8) =103071a(9) =318890a(10) =1969710a(11) =6832816a(12) =23130558a(13) =129897418a(14) =458450153a(15) =1654097198a(16) =8623517185a(17) =30994436542a(18) =117035636551a(19) =575738987147

External references