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 A247379 #8 Aug 01 2019 03:49:04 %S A247379 1,2,1,2,1,3,1,8,1,5,1,6,1,7,3,8,1,2,1,1,3,1,1,1,5,2,1,1,1,6,1,2,1,17, %T A247379 7,2,1,19,3,40,1,2,1,1,3,2,1,6,7,1,3,4,1,1,5,2,1,29,1,2,1,31,9,64,1,2, %U A247379 1,1,3,2,1,8,1,1,3,1,7,1,1,2,1,1,1,1 %N A247379 a(n) = gcd(EKG(n),n) with EKG = A064413. %C A247379 a(n) = gcd(A064413(n),n); %C A247379 a(A247383(n)) = n and a(m) != n for m < A247383(n). %H A247379 Reinhard Zumkeller, <a href="/A247379/b247379.txt">Table of n, a(n) for n = 1..10000</a> %o A247379 (Haskell) %o A247379 a247379 n = gcd n $ a064413 n %Y A247379 Cf. A064413, A152458 (fixed points), A247383. %K A247379 nonn %O A247379 1,2 %A A247379 _Reinhard Zumkeller_, Sep 15 2014