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%I #2 Mar 31 2012 19:53:15
%S 1,-1,-1,-1,1,1,0,0,0,-1,-1,-1,1,0,1,1,0,0,0,0,-1,-1,-1,0,1,0,0,1,0,0,
%T -1,0,0,0,0,-1,0,0,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,0,-1,-1,-1,-1,-1,0,1,
%U 0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,-1,-1,1,0,0,0,0,1,0,0,0,0,0,1,1,0,0,0,-1
%N Square array T(n,k) read by antidiagonals upwards. Mobius function interleaved with k-1 zeros in each column. Every second value in the first row is either 1 or -1. Redheffer type matrix.
%C The determinant of this matrix appears to be A059841.
%F T(n,k) = if(n==1 then if(k mod 2==0 then -1 else 1) else if(n mod k == 0 then A008683(n/k) else 0)).
%e Table begins:
%e .1.-1..1.-1..1.-1..1
%e -1..1..0..0..0..0..0
%e -1..0..1..0..0..0..0
%e .0.-1..0..1..0..0..0
%e -1..0..0..0..1..0..0
%e .1.-1.-1..0..0..1..0
%e -1..0..0..0..0..0..1
%Y Cf. A008683, A059841, A143142.
%K sign,tabl
%O 1,1
%A _Mats Granvik_, Sep 21 2008
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