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 A112757 #12 Feb 07 2020 09:04:01 %S A112757 1,1,1,1,1,2,1,1,2,3,1,2,2,4,1,1,3,2,4,4,5,3,2,2,6,4,8,3,5,1,9,6,4,4, %T A112757 12,5,1,1,9,6,10,2,18,12,8,8,9,15,3,1,2,2,18,12,20,4,36,15,3,16,5,27, %U A112757 18,30,6,2,4,4,36,24,25,5,8,27,45,9,3,6,32,10,54,36,60,12,4,8,8,45,9,48,15,5 %N A112757 Greatest common divisors of consecutive 5-smooth numbers. %H A112757 Amiram Eldar, <a href="/A112757/b112757.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..750 from Harvey P. Dale) %F A112757 a(n) = gcd(A051037(n), A051037(n+1)). %t A112757 GCD@@#&/@(Partition[Select[Range[2000],Max[Transpose[ FactorInteger[ #]] [[1]]]<6&],2,1]) (* _Harvey P. Dale_, Dec 24 2015 *) %Y A112757 Cf. A051037, A112752. %K A112757 nonn %O A112757 1,6 %A A112757 _Reinhard Zumkeller_, Sep 18 2005