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%I #9 Sep 21 2023 18:47:52
%S 3,17,23,41,71,97,107,113,131,167,197,211,223,233,311,383,397,401,457,
%T 467,479,487,491,503,521,617,647,673,691,709,727,743,761,773,809,863,
%U 881,887,907,919,937,941,971,991,1009,1013,1097,1117,1171,1213,1249,1283
%N Primes p such that p + previousprime(p) is a squarefree number.
%F a(n) = A206329(n) - A206462 (n).
%e 3+2 = 5 = A206462(1), 17+13 = 30 = A206462(2).
%t Select[Prime[Range[250]],SquareFreeQ[#+NextPrime[#,-1]]&] (* _Harvey P. Dale_, Sep 21 2023 *)
%Y Cf. A001043, A001358, A005117, A206329, A206462.
%K nonn
%O 1,1
%A _Zak Seidov_, Feb 10 2012
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