%I A156241
%S A156241 1,1,1,1,0,1,0,0,0,1,1,0,0,0,1,1,1,1,0,0,1,1,0,0,0,0,0,1,0,0,0,0,
%T A156241 0,0,0,1,0,0,0,0,0,0,0,0,1,1,1,0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,1,
%U A156241 0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,1,0,0
%V A156241 1,-1,1,-1,0,1,0,0,0,1,-1,0,0,0,1,1,-1,-1,0,0,1,-1,0,0,0,0,0,1,0,0,0,0,
%W A156241 0,0,0,1,0,0,0,0,0,0,0,0,1,1,-1,0,0,-1,0,0,0,0,1,-1,0,0,0,0,0,0,0,0,0,
               1,
%X A156241 0,0,0,0,0,0,0,0,0,0,0,1,-1,0,0,0,0,0,0,0,0,0,0,0,1,1,-1,0,0,0,0,-1,0,
               0
%N A156241 Triangle read by rows, T(n,k). If k divides n then A008683(n)*A008683(k).
%C A156241 A008683 is found in the first column. A087003 appears in the second column.
%C A156241 The definition does not match the values for n=k. Apparently T(n,n) has 
               been set to 1, not mu(n)*mu(n). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Mar 14 2009]
%Y A156241 Sequence in context: A055132 A128408 A121802 this_sequence A156254 A010056 
               A155898
%Y A156241 Adjacent sequences: A156238 A156239 A156240 this_sequence A156242 A156243 
               A156244
%K A156241 sign,tabl
%O A156241 1,1
%A A156241 Mats Granvik (mats.granvik(AT)abo.fi), Feb 07 2009