Search: id:A032352
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%I A032352
%S A032352 20,32,51,53,62,84,89,107,113,114,126,133,134,135,141,146,150,164,
%T A032352 167,168,171,176,179,185,189,192,196,204,207,210,218,219,232,236,240,
%U A032352 248,249,251,256,258,282,294,298,305,309,314,315,317,323,324,326,328
%N A032352 Numbers n such that there is no prime between 10*n and 10*n+9.
%C A032352 Numbers n with property that appending any single decimal digit to n 
               does not produce a prime.
%C A032352 A007920(n*10) > 10.
%e A032352 m=32: 321=3*107, 323=17*19, 325=5*5*13, 327=3*109, 329=7*47, therefore 
               32 is a term.
%p A032352 a:=proc(n) if map(isprime,{seq(10*n+j,j=1..9)})={false} then n else fi 
               end: seq(a(n),n=1..350); (Emeric Deutsch (deutsch(AT)duke.poly.edu), 
               Aug 01 2005)
%t A032352 f[n_] := PrimePi[10n + 10] - PrimePi[10n]; Select[ Range[342], f[ # ] 
               == 0 &] (from Robert G. Wilson v Sep 24 2004)
%Y A032352 Sequence in context: A077343 A116131 A075035 this_sequence A124665 A134989 
               A119873
%Y A032352 Adjacent sequences: A032349 A032350 A032351 this_sequence A032353 A032354 
               A032355
%K A032352 nonn
%O A032352 1,1
%A A032352 Jeff Burch (jmburch(AT)osprey.smcm.edu)
%E A032352 More terms from Miklos Kristof (kristmikl(AT)freemail.hu), Aug 27 2002

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