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Primes not occurring in A084721.
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%I #6 Jul 22 2020 11:39:24

%S 3,7,13,19,31,41,43,61,71,83,103,109,131,137,139,151,157,167,179,193,

%T 197,199,223,229,241,257,271,281,283,311,337,349,383,421,433,439,461,

%U 463,487,503,523,547,571

%N Primes not occurring in A084721.

%C Complement of the range of A084721 within the primes A000040.

%o (PARI) N=300; setminus(primes(primepi(A083569(N)+N)),Set(vector(N,n,A083569(n)+n))) \\ _M. F. Hasler_, Apr 11 2015

%Y Cf. A083569, A084721.

%K nonn

%O 1,1

%A _M. F. Hasler_, Apr 11 2015