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 A026255 #15 Feb 16 2025 08:32:35 %S A026255 2,1,4,3,7,9,5,11,6,14,8,16,18,10,21,12,23,13,26,28,15,30,17,33,35,19, %T A026255 37,20,40,22,42,44,24,47,25,49,27,52,54,29,56,31,59,32,61,63,34,66,36, %U A026255 68,70,38,73,39,75,41,78,80,43,82,45,85,46 %N A026255 Beginning with the natural numbers, swap [ k*sqrt(3) ] and [ (k/2)*(3 + sqrt(3)) ], for all k >= 1. %C A026255 Self-inverse integer permutation induced by Beatty sequences for sqrt(3) and (3+sqrt(3))/2. - _Reinhard Zumkeller_, Jun 11 2005 %H A026255 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/BeattySequence.html">Beatty Sequence</a> %H A026255 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %H A026255 <a href="/index/Be#Beatty">Index entries for sequences related to Beatty sequences</a> %F A026255 a(A022838(n)) = A054406(n) and a(A054406(n)) = A022838(n). - _Reinhard Zumkeller_, Jun 11 2005 %Y A026255 Cf. A026250, A026262. %K A026255 nonn %O A026255 1,1 %A A026255 _Clark Kimberling_