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 A131858 #5 Dec 27 2019 23:15:34 %S A131858 1,11,16,21,26,31,41,56,61,81,91,121,131,146,151,161,171,176,181,186, %T A131858 191,211,241,251,256,261,266,271,276,286,296,301,316,321,331,336,341, %U A131858 346,351,361,376,381,386,391,406,416,421,426,431,436,446,451,466,471 %N A131858 Numbers m such that z(m)=(1,0) with z as defined in A131851. %C A131858 Intersection of A131855 and A131859: A131851(a(n))=1, A131852(a(n))=0. %H A131858 Seiichi Manyama, <a href="/A131858/b131858.txt">Table of n, a(n) for n = 1..10000</a> %Y A131858 Cf. A131851, A131853, A131856, A131860. %K A131858 nonn %O A131858 1,2 %A A131858 _Reinhard Zumkeller_, Jul 22 2007