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%I #4 Oct 01 2013 17:58:10
%S 20,62,118,194,262,346,422,502,602,658,790,878,974,1066,1162,1266,
%T 1378,1462,1578,1658,1766,1882,2030,2122,2238,2338,2458,2570,2662,
%U 2762,2866,2986,3106,3290,3406,3514,3614,3698,3830,3918,4022,4150,4310,4430,4538
%N Sum of the sides of ordered 2 prime sided prime triangles.
%F An ordered 2 prime sided prime triangle is 3 consecutive primes arranged in a triangle of the form p(3n-2) p(3n-1) p(3n ) n=1, 2, .. and sides s1 = p(3n-2) p(3n-1) s2 = p(3n-1) p(3n ) s3 = p(3n-2) p(3n )
%e The first 2 prime sided prime triangle is
%e 2
%e 3 5
%e sum of sides = (2+3) + (3+5) + (2+5) = 20 the first entry.
%o (PARI) sumsidestri3x3(n) = { local(x,j,s); forstep(x=1,n,3, s = prime(x)+prime(x+1)+prime(x+2); print1(2*s",") ) }
%K easy,nonn
%O 1,1
%A _Cino Hilliard_, Apr 07 2005
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