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 A053064 #19 Dec 06 2021 03:19:15 %S A053064 1,12,312,3124,53124,531246,7531246,75312468,975312468,97531246810, %T A053064 1197531246810,119753124681012,13119753124681012,1311975312468101214, %U A053064 151311975312468101214,15131197531246810121416,1715131197531246810121416,171513119753124681012141618 %N A053064 Alternately append n to end or beginning of previous term. %C A053064 A055642(a(n)) = A058183(n); A007953(a(n)) = A037123(n); A010879(a(n)) = A010879(2*floor(n/2)) = A010879(A131055(n)); A000030(a(n)) = A000030(ceiling(n/2)). - _Reinhard Zumkeller_, Oct 10 2008 %D A053064 Felice Russo, A set of new Smarandache functions, sequences and conjectures in number theory, American Research Press 2000 %H A053064 R. Zumkeller, <a href="/A053064/b053064.txt">Table of n, a(n) for n = 1..100</a> %Y A053064 Cf. A007908, A053063. %K A053064 easy,nonn,base,less %O A053064 1,2 %A A053064 _Felice Russo_, Feb 25 2000 %E A053064 More terms from _Sean A. Irvine_, Dec 05 2021