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%I #4 Mar 30 2012 18:57:22
%S 4,21,38,55,72,93,110,127,144,165,182,199,216,237,254,271,288,309,326,
%T 343,360,377,398,415,432,449,470,487,504,521,542,559,576,593,614,631,
%U 648,665,682,703,720,737,754,775,792,809,826,847,864,881,898,919,936,953,970,987,1008
%N Positions of 0 in the zero-one sequence [nr]-[4r]-[nr-4r], where r=sqrt(5), n>=1.
%C See A188014.
%t r=5^(1/2)); k=4;
%t t=Table[Floor[n*r]-Floor[(n-k)*r]-Floor[k*r],{n,1,220}]
%t Flatten[Position[t,0]] (*A188219*)
%Y Cf. A188014.
%K nonn
%O 1,1
%A _Clark Kimberling_, Mar 24 2011