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a(n) = floor((7+sqrt(5))*n/4); complement of A187330.
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%I #8 Dec 19 2021 15:21:30

%S 2,4,6,9,11,13,16,18,20,23,25,27,30,32,34,36,39,41,43,46,48,50,53,55,

%T 57,60,62,64,66,69,71,73,76,78,80,83,85,87,90,92,94,96,99,101,103,106,

%U 108,110,113,115,117,120,122,124,126,129,131,133,136,138,140,143,145

%N a(n) = floor((7+sqrt(5))*n/4); complement of A187330.

%C A187339 and A187330 are a pair of Beatty sequences.

%F a(n)=floor((7+sqrt(5))*n/4).

%t Table[Floor[((7+5^(1/2))/4)n], {n,1,120}]

%Y Cf. A187330.

%K nonn

%O 1,1

%A _Clark Kimberling_, Mar 08 2011