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 A166505 #4 Jul 14 2012 11:32:32 %S A166505 202,203,205,207,302,303,305,502,505,507,702,703,705,707,1102,1105, %T A166505 1107,1302,1305,1702,1703,1705,1707,1902,1903,1905,2002,2005,2007, %U A166505 2013,2019,2022,2023,2025,2031,2032,2033,2035,2037,2041,2043,2047,2052,2055,2057 %N A166505 Numbers in A166504 which are not in A152242. %C A166505 All terms have at least one zero digit and are composite. %F A166505 a(n) = A166504(A166506(n)) %o A166505 (PARI) for(i=1,1e4, is_A166504(i) & !is_A152242(i) & print1(i", ")) %Y A166505 Cf. A152242, A166506 (indices of these terms in A166504). %K A166505 nonn,base %O A166505 1,1 %A A166505 _M. F. Hasler_, Nov 02 2009 %E A166505 Edited by _Charles R Greathouse IV_, Apr 23 2010