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%I #7 Oct 06 2019 18:20:20
%S 8,23,32,36,44,54,66,74,77,84,91,104,113,115,122,130,132,162,174,178,
%T 187,188,191,204,212,222,224,232,235,259,267,281,286,295,302,305,317,
%U 325,344,353,367,368,384,389,391,401,406,427,430,433,457,458,461,464
%N Concatenation of 'nextprime(n) and n and prevprime(n)' is a prime.
%H Harvey P. Dale, <a href="/A034811/b034811.txt">Table of n, a(n) for n = 0..1000</a>
%e n=353 -> next prime is 359, previous prime is 349, thus '359353349' is a prime.
%t Select[Range[500],PrimeQ[FromDigits[Flatten[IntegerDigits/@ { NextPrime[#], #, NextPrime[ #,-1]}]]]&] (* _Harvey P. Dale_, Jan 12 2016 *)
%Y Cf. A034808-A034821.
%K nonn,base
%O 0,1
%A _Patrick De Geest_, Oct 15 1998
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