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 A053180 #11 Sep 04 2018 11:25:16 %S A053180 27,57,77,87,117,147,177,187,207,217,237,247,267,287,297,327,357,377, %T A053180 387,407,417,427,437,447,477,497,507,517,527,537,567,597,627,637,657, %U A053180 667,687,697,707,717,737,747,767,777,807,817,837,847,867,897,917,927 %N A053180 Numbers ending in 7 which are not prime. %H A053180 G. C. Greubel, <a href="/A053180/b053180.txt">Table of n, a(n) for n = 1..10000</a> %t A053180 Select[Range[7,1000,10],!PrimeQ[#]&] (* _Harvey P. Dale_, Nov 03 2013 *) %Y A053180 Intersection of A002808 (composites) and A017353 (ending with 7). - _Michel Marcus_, Sep 04 2018 %K A053180 easy,nonn,base %O A053180 1,1 %A A053180 _Enoch Haga_, Feb 29 2000