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 A189397 #9 Sep 22 2017 03:00:27 %S A189397 1,3,5,7,9,11,13,15,17,19,21,22,25,27,29,31,32,35,36,39,41,42,45,46, %T A189397 49,51,53,55,56,59,60,63,65,66,69,70,73,74,76,79,80,83,84,86,88,90,93, %U A189397 94,97,98,100,103,104,107,108,110,112,114,117,118,120,122,124,126,128,130,132,134,136,138,139,142,144,146,148,150,152,154,156,158,160,162,163,166 %N A189397 a(n) = n + [n*r/t] + [n*s/t]; r=1, s=1/sqrt(2), t=sqrt(3). %C A189397 See A189395. %H A189397 G. C. Greubel, <a href="/A189397/b189397.txt">Table of n, a(n) for n = 1..1000</a> %t A189397 r=1; s=2^(-1/2); t=3^(1/2); %t A189397 a[n_] := n + Floor[n*s/r] + Floor[n*t/r]; %t A189397 b[n_] := n + Floor[n*r/s] + Floor[n*t/s]; %t A189397 c[n_] := n + Floor[n*r/t] + Floor[n*s/t] %t A189397 Table[a[n], {n, 1, 120}] (*A189395*) %t A189397 Table[b[n], {n, 1, 120}] (*A189396*) %t A189397 Table[c[n], {n, 1, 120}] (*A189397*) %Y A189397 Cf. A189395, A189396. %K A189397 nonn %O A189397 1,2 %A A189397 _Clark Kimberling_, Apr 21 2011