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 A118678 #8 Nov 14 2016 07:19:53 %S A118678 105,165,195,255,273,285,345,357,385,429,455,555,561,595,609,615,627, %T A118678 645,665,705,715,759,777,795,805,897,935,957,969,987,1001,1005,1015, %U A118678 1023,1045,1065,1085,1095,1105,1131,1185,1221,1235,1239,1245,1265,1295 %N A118678 Primitive orders of cyclotomic polynomials containing a coefficient with absolute value >= 2. %C A118678 All elements of A013590 with no proper divisors belonging to A013590. %H A118678 T. D. Noe, <a href="/A118678/b118678.txt">Table of n, a(n) for n=1..1000</a> %Y A118678 Cf. A013590, A117318, A117223. %Y A118678 Cf. A152940, A152941, A152942, A152943, A152955 %Y A118678 Cf. A154430 %K A118678 nonn %O A118678 1,1 %A A118678 _Max Alekseyev_, May 19 2006