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 A112074 #2 Mar 31 2012 14:02:21 %S A112074 49,71,119,191,239,241,359,409,431,481,599,601,649,721,769,791,889, %T A112074 911,959,1031,1079,1081,1199,1249,1271,1321,1439,1441,1489,1561,1609, %U A112074 1631,1729,1751,1799,1871,1919,1921,2039,2089,2111,2161,2279,2281 %N A112074 Odd numbers n for which 7 is the smallest i (>= 1) with Jacobi symbol J(i,n) getting either a value 0 or -1. %Y A112074 Row 4 of A112070. a(n) = 2*A112064(n)+1. %K A112074 nonn %O A112074 1,1 %A A112074 _Antti Karttunen_, Aug 27 2005