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%I #7 Mar 30 2012 18:40:02
%S 2,7,3,17,11,5,29,19,13,41,31,23,53,43,37,67,59,47,79,71,61,97,83,73,
%T 107,101,89,127,109,103,139,139,131,113,157,149,137,173,163,151,191,
%U 179,167,193,181,227,211,197,239,229,223,257,263,251
%N Permutation of primes generated by 3-rowed array shown below.
%C 2 7 17 29 41 53 67 79...(A031377)
%C 3 11 19 31 43 59 71 83...(A031369)
%C 5 13 23 37 47 61 73 89...(A031336)
%F a(n) = A000040(a(p+3q) = a(p)+3q) with p and q positive integers.
%F a(n) = PrimePi(a(p+3q) = a(p)+3q) with p and q positive integers.
%Y Cf. A115302.
%K easy,nonn
%O 1,1
%A _Giovanni Teofilatto_, Oct 17 2006, Nov 08 2006