%I #21 Jan 29 2014 01:05:04
%S 634038307449,4846359321105,11927878640385,20835183400305,
%T 34166605315305,54096163177785,63154533545265,88365393281985,
%U 189080281720065,850943773070385,917252751841665,1278728202166185,1602254869802049,3742704749436465,6082185264252945
%N Pseudoprimes n to base 2 such that n-2, n+2 and n+4 are primes.
%C All numbers in this sequence end in either 5 or 9.
%H Shyam Sunder Gupta, <a href="/A230559/b230559.txt">Table of n, a(n) for n = 1..82</a>
%e 634038307449 is a pseudoprime (base 2) and 634038307447, 634038307451 and 634038307453 are primes.
%Y Cf. A001567, A057942, A230488, A230489, A228575.
%K nonn
%O 1,1
%A _Shyam Sunder Gupta_, Oct 27 2013