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%I #12 Feb 18 2024 02:04:29
%S 2,67,83,139,149,383,503,557,577,587,601,613,727,937,1181,1259,1451,
%T 1453,1489,1531,1621,1657,1831,1879,1907,2269,2441,2531,2897,3191,
%U 3709,3779,4057,4153,4373,4603,4871,5197,5233,5261,5279,5417,5711
%N Primes which when concatenated with next 3 primes are also prime.
%H Paolo P. Lava, <a href="/A030472/b030472.txt">Table of n, a(n) for n = 1..1500</a>
%Y Cf. A000040.
%K nonn,base
%O 1,1
%A _Patrick De Geest_
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