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 A169838 #8 Jan 20 2024 16:07:16 %S A169838 3,1,4,7,2,12,5,9,6,18,10,22,11,8,15,31,14,35,16,13,17,41,20,26,21,24, %T A169838 28,56,25,60,29,19,30,27,33,66,34,23,38,73,37,80,39,43,40,88,44,49,45, %U A169838 32,46,99,47,52,48,36,55,106,51,114,59,50,63,53,58,127,64,42,54,133,62,137,65 %N A169838 a(n) = position of n in A169837. %C A169838 A generalization of A064421. %Y A169838 Cf. A064421, A169837. %K A169838 nonn %O A169838 2,1 %A A169838 _T. D. Noe_ and _N. J. A. Sloane_, Jun 02 2010