This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A187339 #8 Dec 19 2021 15:21:30
%S A187339 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 A187339 57,60,62,64,66,69,71,73,76,78,80,83,85,87,90,92,94,96,99,101,103,106,
%U A187339 108,110,113,115,117,120,122,124,126,129,131,133,136,138,140,143,145
%N A187339 a(n) = floor((7+sqrt(5))*n/4); complement of A187330.
%C A187339 A187339 and A187330 are a pair of Beatty sequences.
%F A187339 a(n)=floor((7+sqrt(5))*n/4).
%t A187339 Table[Floor[((7+5^(1/2))/4)n], {n,1,120}]
%Y A187339 Cf. A187330.
%K A187339 nonn
%O A187339 1,1
%A A187339 _Clark Kimberling_, Mar 08 2011