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 A337007 #16 Jul 09 2025 04:53:47 %S A337007 1,2,3,5,7,2,3,11,5,2,3,7,11,2,5,3,13,2,7,3,17,2,19,3,23,2,5,13,7,6,5, %T A337007 17,7,8,3,5,19,4,3,29,5,2,11,3,31,2,13,3,35,2,29,3,37,2,17,3,41,2,5, %U A337007 23,7,12,5,31,7,2,3,43,5,2,3,47,5,22,3,7,19,8,9,5,7,2,13,11 %N A337007 a(n) = gcd(b(n),b(n+1)), where b(n) = A336957(n). %H A337007 N. J. A. Sloane, <a href="/A337007/b337007.txt">Table of n, a(n) for n = 1..20000</a> %e A337007 A336957(3)=6, A336957(4) = 15, gcd(6,15) = 3 = a(3). %Y A337007 Cf. A336957, A337008. %K A337007 nonn %O A337007 1,2 %A A337007 _Scott R. Shannon_ and _N. J. A. Sloane_, Aug 11 2020