Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00001001 or 00100101.

A260978

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00001001 or 00100101.

Terms

    a(0) =2755a(1) =1873a(2) =2576a(3) =5506a(4) =9144a(5) =18706a(6) =30418a(7) =62878a(8) =107802a(9) =218342a(10) =372200a(11) =752768a(12) =1301722a(13) =2647272a(14) =4577194a(15) =9211590a(16) =16034066a(17) =32273054a(18) =56601764a(19) =112913040a(20) =198964362a(21) =395528584a(22) =701501654a(23) =1386971610a(24) =2469037804a(25) =4864090436

External references