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 A093003 #4 Dec 05 2013 19:56:46 %S A093003 0,0,2,3,3,4,6,6,6,8,9,9,10,11,12,14,13,15,16,16,17,18,19,20,21,22,23, %T A093003 23,24,24,27,27,30,28,29,29,32,33,33,36,33,37,37,38,37,40,39,43,42,45, %U A093003 40,48,47,45,48,48,48,50,52,53,52,55,55,57,53,61,58,59,58,61,64,65,61 %N A093003 Number of composite numbers among next n numbers. %F A093003 comp(n(n+1)/2) - comp(n(n-1)/2), where comp(m) = number of composite numbers less than or equal to m. %e A093003 a(5) = 3, among 11,12,13,14,15 there are three composite numbers 12,14 and 15. %Y A093003 Cf. A093004. %K A093003 nonn %O A093003 1,3 %A A093003 _Amarnath Murthy_, Mar 29 2004 %E A093003 Corrected and extended by _Joshua Zucker_, May 08 2006