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 A054086 #10 Aug 13 2024 05:05:36 %S A054086 1,3,2,4,7,5,6,11,8,9,14,10,12,18,13,15,22,16,17,26,19,20,29,21,23,33, %T A054086 24,25,37,27,28,41,30,31,44,32,34,48,35,36,52,38,39,55,40,42,59,43,45, %U A054086 63,46,47,67,49,50,70,51,53,74,54,56,78,57 %N A054086 For k >= 1, let p(k)=least h in N not already an a(i), q(k)=p(k)+k, a(3k-1)=q(k), a(3k)=p(k), a(3k+1)=least h in N not already an a(i). %Y A054086 The trisection (3, 7, 11, 14, ...) is A003512, with n-th term [n*(2+sqrt(3))], the complement of this is A003511, with n-th term [n*(1+sqrt(3))/2]. %Y A054086 A054087, A054088. %K A054086 nonn,eigen %O A054086 1,2 %A A054086 _Clark Kimberling_