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 A175636 #4 Aug 10 2015 00:36:10 %S A175636 1,3,1,1,2,2,1,2,2,1,1,2,1,2,2,1,1,2,3,1,1,1,4,2,1,1,1,1,2,2,1,2,1,1, %T A175636 1,1,1,1,2,1,1,6,2,1,2,2,1,1,1,1,2,1,1,1,1,1,2,5,1,2,3,1,3,1,1,1,1,2, %U A175636 1,1,1,2,2,1,2,2,2,1,2,4,2,1,1,1,1,1,2,1,2,1,2,1,2,7,1,3,1,1,1,1,3,1,2,1,1 %N A175636 Maximal (nonzeros) run length of semiprimes of the form k+4, k+8, k+12,.., where k is a non-semiprime. %e A175636 a(1)=1 because k=0=non-semiprime and 0+4=4=semiprime; a(2)=3 because k=2=non-semiprime and 2+4=6=semiprime, 2+8=10=semiprime, 2+12=14=semiprime; a(3)=1 because k=5=non-semiprime and 5+4=9=semiprime. %Y A175636 Cf. A175612, A175632. %K A175636 nonn %O A175636 1,2 %A A175636 Vladislav-Stepan Malakovsky & _Juri-Stepan Gerasimov_, Aug 01 2010