Number of nX6 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 2 neighboring 1s.

A297297

Number of nX6 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 2 neighboring 1s.

Terms

    a(0) =1a(1) =6a(2) =17a(3) =50a(4) =157a(5) =495a(6) =1574a(7) =5031a(8) =16123a(9) =51749a(10) =166241a(11) =534301a(12) =1717724a(13) =5523165a(14) =17760715a(15) =57115518a(16) =183679098a(17) =590706934a(18) =1899713778a(19) =6109510235a(20) =19648337645a(21) =63189642502a(22) =203219959503a(23) =653562362810

External references