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 A108591 #13 Feb 16 2025 08:32:58 %S A108591 3,6,1,9,12,2,15,18,4,21,25,5,28,31,7,34,37,8,40,43,10,47,50,53,11,56, %T A108591 59,13,62,65,14,69,72,16,75,78,17,81,84,19,87,91,20,94,97,100,22,103, %U A108591 106,23,109,113,24,116,119,26,122,125,27,128,131,29,135,138,30,141,144 %N A108591 Self-inverse integer permutation induced by Beatty sequences for Pi and Pi/(Pi-1). %H A108591 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/BeattySequence.html">Beatty Sequence</a> %H A108591 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %H A108591 <a href="/index/Be#Beatty">Index entries for sequences related to Beatty sequences</a> %F A108591 a(A022844(n))=A054386(n) and a(A054386(n))=A022844(n). %Y A108591 Cf. A108590, A108592, A108599. %K A108591 nonn,easy %O A108591 1,1 %A A108591 _Reinhard Zumkeller_, Jun 11 2005 %E A108591 a(53)/a(54) joined by _Georg Fischer_, May 24 2022