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%I #3 Mar 30 2012 16:49:38
%S 0,0,1,0,0,1,0,2,1,2,0,0,0,0,1,0,4,2,4,1,4,0,0,4,0,2,2,1,0,6,0,8,2,6,
%T 1,4,0,0,6,0,0,4,2,0,3,0,6,4,12,2,16,2,8,3,6,0,0,0,0,6,0,4,0,0,2,1,0,
%U 10,4,12,4,24,2,16,6,12,1,8,0,0,10,0,6,8,0,0,12,4,2,4,1,0,12,0,20,0,18,4,24
%N Array T(m,n) = n*phi(m) - phi(mn) (m,n >= 1), read by antidiagonals.
%C It follows from the definition that n*phi(m) - phi(mn) >= 0.
%D D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, p. 9.
%Y Cf. A000010, A076953, A079549, A079550.
%K nonn,tabl
%O 1,8
%A _N. J. A. Sloane_, Jan 24 2003
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