%I A034818
%S A034818 657,4929,10647,18291,20907,22653,27381,28053,28671,42471,48441,57363,
%T A034818 69651,79569,89853,93261,95967,101283,110763,119481,128613,145719,
%U A034818 149409,174993,201417,204861,205329,221883,248391,269199,272799,293451
%N A034818 Concatenations C1 and C2 and C3 are all prime (see the comment lines).
%C A034818 C1 = 'nextprime(n) followed by n'
%C A034818 C2 = 'n followed by prevprime(n)'
%C A034818 C3 = 'nextprime(n) followed by n followed by prevprime(n)'
%e A034818 n=95967 -> next prime is 95971, previous prime is 95959, thus '9597195967' 
               and '9596795959' and '959719596795959' are all three primes.
%Y A034818 Cf. A034808-A034821.
%Y A034818 Sequence in context: A088894 A015277 A135418 this_sequence A068260 A023294 
               A067235
%Y A034818 Adjacent sequences: A034815 A034816 A034817 this_sequence A034819 A034820 
               A034821
%K A034818 nonn,base
%O A034818 0,1
%A A034818 Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1998.