%I
%S 0,1,2,1,2,3,0,2,3,4,1,1,3,4,4,0,2,2,3,4,5,1,1,2,2,4,5,6,0,1,1,3,3,5,
%T 6,6,0,0,2,2,4,4,5,6,7,0,1,1,3,3,4,4,6,7,8,1,1,2,2,3,3,5,5,7,8,8,0,2,
%U 2,2,2,4,4,6,6,7,8,9,1,1,2,2,3,3,5,5,6,6,8,9,9,0,1,1,3,3,4,4,5,5,7,7
%N Triangle read by rows: T(n,k) = number of primes not less than nk and not greater n+k, 0<=k<n.
%C T(n,0) = A010051(n); T(n,n1) = A000720(2*n1).
%K nonn,tabl
%O 1,3
%A _Reinhard Zumkeller_, Nov 03 2003
