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A208273 Composite numbers containing a digit 2. 1

%I #7 Aug 03 2014 14:01:39

%S 12,20,21,22,24,25,26,27,28,32,42,52,62,72,82,92,102,112,120,121,122,

%T 123,124,125,126,128,129,132,142,152,162,172,182,192,200,201,202,203,

%U 204,205,206,207,208,209,210,212,213,214,215,216,217,218,219,220,221

%N Composite numbers containing a digit 2.

%C Subsequence of A011532. Complement of A208272 with respect to A011532.

%t Select[Range[300], ! PrimeQ[#] && MemberQ[IntegerDigits[#], 2] &] (* _T. D. Noe_, Mar 06 2012 *)

%Y Cf. A208272 (primes containing a digit 2), A011532 (numbers containing a digit 2).

%K nonn,base

%O 1,1

%A _Jaroslav Krizek_, Mar 04 2012

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Last modified August 13 12:52 EDT 2024. Contains 375142 sequences. (Running on oeis4.)