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n + floor( nr/t ) + floor( ns/t ), where r=1, s=arctan(1/3), t=arctan(3).
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%I #6 Jun 30 2014 18:02:54

%S 1,3,5,8,10,11,13,16,18,20,21,24,26,28,30,32,34,36,38,41,42,44,46,49,

%T 51,52,54,57,59,61,62,65,67,69,72,73,75,77,80,82,83,85,88,90,92,93,96,

%U 98,100,102,104,106,108,110,113,114,116,118,121,123,124,126,129,131,133,135,137,139,141,144,145,147,149,152,154,155,157,160,162

%N n + floor( nr/t ) + floor( ns/t ), where r=1, s=arctan(1/3), t=arctan(3).

%C See A189753.

%C First disagreement with b(n) = floor(5*n/4) + floor(4*n/5) at index 35: a(35) = 72, b(35) = 71. [_Bruno Berselli_, Jun 30 2014]

%t (See A189753.)

%Y Cf. A189753, A189754.

%K nonn

%O 1,2

%A _Clark Kimberling_, Apr 26 2011