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 A100425 #3 Mar 30 2012 17:22:34 %S A100425 4,6,8,9,12,14,18,21,25,26,35,36,50,52,56,66,68,74,77,95,96,98,108, %T A100425 118,141,143,146,162,166,176,185,186,187,203,207,228,235,245,250,254, %U A100425 273,275,285,290,295,302,322,340,350,361,375,380,402,404,416,417,436,445 %N A100425 A sieve transform applied to the composite numbers. %t A100425 (* see A100424 for the definition of SieveTransform *) SieveTransform[Complement[Range[2, 1000], Prime[Range[PrimePi[1000]]]]] %Y A100425 Cf. A099361, A100424, A100426. %K A100425 nonn %O A100425 1,1 %A A100425 _T. D. Noe_, Nov 19 2004