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 A208271 #7 Aug 03 2014 14:01:39 %S A208271 1,10,12,14,15,16,18,21,51,81,91,100,102,104,105,106,108,110,111,112, %T A208271 114,115,116,117,118,119,120,121,122,123,124,125,126,128,129,130,132, %U A208271 133,134,135,136,138,140,141,142,143,144,145,146,147,148,150,152,153 %N A208271 Nonprime numbers containing a digit 1. %C A208271 Subsequence of A011531. Complement of A208270 with respect to A011531. %t A208271 Select[Range[200], ! PrimeQ[#] && MemberQ[IntegerDigits[#], 1] &] (* _T. D. Noe_, Mar 06 2012 *) %Y A208271 Cf. A208270 (primes containing a digit 1), A011531 (numbers containing a digit 1). %K A208271 nonn,base %O A208271 1,2 %A A208271 _Jaroslav Krizek_, Mar 04 2012