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 A275189 #14 Sep 01 2016 21:34:43 %S A275189 3,6,10,23,29,36,97,108,185,199,252,310,337,404,424,446,618,631,707, %T A275189 833,848,905,1000,1097,1196,1253,1269,1378,1511,1552,1796,1815,2014, %U A275189 2060,2363,2589,2640,2692,2928,3179,3261,3554,3673,3768,3829,4370,4504,4707 %N A275189 Positions of 4 in A274640. %H A275189 Alois P. Heinz, <a href="/A275189/b275189.txt">Table of n, a(n) for n = 1..10074</a> %H A275189 Alois P. Heinz, <a href="/A275189/a275189.jpg">Positions of first 1410 4's in plane of A274640</a> %F A275189 A274640(a(n))=4. %Y A275189 Cf. A274640, A275172, A275188, A275190, A275191, A275192, A275193, A275194. %K A275189 nonn %O A275189 1,1 %A A275189 _Zak Seidov_, Jul 19 2016