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 A083261 #12 May 21 2017 10:27:06
%S A083261 1,2,2,2,2,2,2,4,2,2,2,2,2,6,2,2,2,2,2,6,6,2,2,4,2,2,4,2,2,2,2,2,6,6,
%T A083261 6,2,2,6,6,2,2,2,2,12,6,2,2,4,4,6,6,2,2,6,6,6,6,2,2,2,2,6,4,2,6,2,2,6,
%U A083261 6,2,2,2,2,6,12,6,6,2,2,16,2,2,2,6,6,6,6,2,2,6,6,6,6,6,6,2,2,12,12,2,2,2,2
%N A083261 a(n) = gcd(A046523(n+1), A046523(n)).
%H A083261 Antti Karttunen, <a href="/A083261/b083261.txt">Table of n, a(n) for n = 1..10000</a>
%o A083261 (PARI)
%o A083261 A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f, (p=nextprime(p+1))^f[i]); }; \\ This function from _Charles R Greathouse IV_, Aug 17 2011
%o A083261 A083261(n) = gcd(A046523(n),A046523(1+n)); \\ From _Antti Karttunen_, May 21 2017
%Y A083261 Cf. A046523, A071364, A083255, A083256, A083257, A083258, A083259, A083260, A286255.
%K A083261 nonn
%O A083261 1,2
%A A083261 _Labos Elemer_, May 09 2003