%I A047885
%S A047885 0,0,0,0,1,0,0,1,1,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,1,0,0,0,0,1,0,0,0,
%T A047885 0,1,0,0,0,0,1,0,1,0,0,0,0,0,1,1,1,1,1,1,0,0,0,0,1,2,1,
%U A047885 2,1,2,1,0,0
%V A047885 0,0,0,0,1,0,0,1,1,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,-1,0,0,0,0,1,0,0,0,
%W A047885 0,1,0,0,0,0,-1,0,-1,0,0,0,0,0,-1,-1,-1,-1,-1,-1,0,0,0,0,-1,-2,-1,
%X A047885 -2,-1,-2,-1,0,0
%N A047885 Array a(m,n) = pi(m+n)-pi(m)-pi(n) read by antidiagonals, where pi() 
               = A000720 (m,n >= 0).
%e A047885 Beginning of array is
%e A047885 0 0 0 0 0 0 0 0 ...
%e A047885 0 1 1 0 1 0 1 0 ...
%e A047885 0 1 0 0 0 0 -1 ...
%e A047885 0 0 0 -1 0 -1 -1 ...
%Y A047885 Cf. A047886.
%Y A047885 Sequence in context: A143668 A029445 A107393 this_sequence A072731 A129174 
               A129175
%Y A047885 Adjacent sequences: A047882 A047883 A047884 this_sequence A047886 A047887 
               A047888
%K A047885 sign,tabl,easy,nice
%O A047885 0,59
%A A047885 N. J. A. Sloane (njas(AT)research.att.com).