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%I #8 Jul 10 2020 03:51:16
%S 2,6,11,15,19,23,32,36,40,49,53,57,61,66,70,74,78,83,87,91,95,104,108,
%T 112,121,125,129,138,142,146,150,155,159,163,167,176,180,184,193,197,
%U 201,210,214,218,222,227,231,235,239,248,252,256,265,269,273,282,286,290,294,299,303,307,311,316,320,324,328,337,341,345,354,358
%N Positions of 2 in A190886.
%C See A190886.
%t r = Sqrt[5];
%t f[n_] := Floor[5n*r] - 5*Floor[n*r]
%t t = Table[f[n], {n, 1, 400}] (* A190886 *)
%t Flatten[Position[t, 2]] (* A190889 *)
%Y Cf. A190886.
%K nonn
%O 1,1
%A _Clark Kimberling_, May 26 2011