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 A131860 #5 Dec 28 2019 07:46:35 %S A131860 3,18,23,33,43,48,53,58,63,83,113,123,163,178,183,243,258,263,278,288, %T A131860 293,298,303,308,318,323,338,343,353,363,368,373,378,383,418,423,438, %U A131860 483,498,503,513,523,528,533,538,543,553,568,573,593,603,633,643,658 %N A131860 Numbers m such that z(m)=(1,1) with z as defined in A131851. %C A131860 Intersection of A131857 and A131859: A131851(a(n))=1, A131852(a(n))=1. %H A131860 Seiichi Manyama, <a href="/A131860/b131860.txt">Table of n, a(n) for n = 1..10000</a> %Y A131860 Cf. A131851, A131853, A131856, A131858. %K A131860 nonn %O A131860 1,1 %A A131860 _Reinhard Zumkeller_, Jul 22 2007