Number of nX5 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 neighboring 1s.

A297428

Number of nX5 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 neighboring 1s.

Terms

    a(0) =1a(1) =18a(2) =43a(3) =105a(4) =535a(5) =1673a(6) =5108a(7) =19690a(8) =66529a(9) =219719a(10) =782043a(11) =2689834a(12) =9138448a(13) =31787848a(14) =109656609a(15) =376254515a(16) =1300385669a(17) =4486150451a(18) =15444407832a(19) =53285238222a(20) =183782980324a(21) =633397239002

External references