Number of nX3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1s.

A297757

Number of nX3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1s.

Terms

    a(0) =1a(1) =12a(2) =52a(3) =186a(4) =1045a(5) =5685a(6) =28565a(7) =148681a(8) =783104a(9) =4082179a(10) =21289432a(11) =111293510a(12) =581390557a(13) =3036127779a(14) =15859365566a(15) =82842802213a(16) =432710054944

External references