This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A179208 #19 Feb 20 2023 06:14:54 %S A179208 11,13,17,103,107,151,179,251,409,421,491,701,709,739,941,1051,1487, %T A179208 1571,1873,2281,2441,2659,2671,2741,2749,2819,3011,3019,3389,3463, %U A179208 4111,4229,4231,4241,4271,4397,5171,5279,5569,5653,6079,6311,6691 %N A179208 Primes prime(k) such that 2*prime(k) = prime(k-2) + prime(k+2). %H A179208 Harvey P. Dale, <a href="/A179208/b179208.txt">Table of n, a(n) for n = 1..1000</a> %t A179208 Transpose[Select[Partition[Prime[Range[300]],5,1],(First[#]+Last[#])/2 == #[[3]]&]][[3]] (* _Harvey P. Dale_, Feb 16 2014 *) %o A179208 (Sage) %o A179208 def is_A179208(n): %o A179208 k = prime_pi(n) %o A179208 return is_prime(n) and 2*n == nth_prime(k-2)+nth_prime(k+2) # _D. S. McNeil_, Jan 08 2011 %Y A179208 Cf. A006562 (balanced primes). %K A179208 nonn %O A179208 1,1 %A A179208 _Juri-Stepan Gerasimov_, Jan 05 2011