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%I #6 Jan 30 2016 03:10:56
%S 5,11,17,19,23,27,29,35,39,41,45,47,53,55,57,59,61,65,71,77,81,83,85,
%T 89,91,95,97,101,103,107,109,113,117,119,121,123,125,131,137,139,143,
%U 145,147,149,153,155,157,161,165,167,173,175,177,179,181,183,185,187,191,197,199,203,207,209,213,215,217,221,225
%N Odd unlucky numbers.
%H Antti Karttunen, <a href="/A266420/b266420.txt">Table of n, a(n) for n = 1..10000</a>
%o (Scheme, with _Antti Karttunen_'s IntSeq-library)
%o (define A266420 (MATCHING-POS 1 1 (lambda (n) (and (odd? n) (zero? (A145649 n))))))
%Y Intersection of A005408 and A050505.
%Y Cf. A145649, A257726.
%Y Cf. also A071904, A266419
%K nonn
%O 1,1
%A _Antti Karttunen_, Jan 28 2016