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%I #3 Mar 30 2012 18:52:40
%S 1,4,6,8,10,12,14,15,19,21,25,26,28,30,32,33,37,38,42,44,48,49,51,53,
%T 57,58,60,61,65,66,72,73,75,77,79,81,83,84,96,97,99,100,104,106,114,
%U 116,120,121,125,126,128,129,133,134,138,140,148,150,152,154,164,165,175
%N Numbers n such that one of nonprime(n)-1 or nonprime(n)+1 is prime.
%C Exactly one of A018252(n)-1 and A018252(n)+1 is prime.
%e a(1)=1 because nonprime(1)-1=0=nonnegative nonprime and nonprime(1)+1=2=prime.
%K nonn
%O 1,2
%A _Juri-Stepan Gerasimov_, Apr 12 2010
%E Corrected (101 removed) by _R. J. Mathar_, Apr 16 2010
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