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%I #3 Mar 30 2012 18:52:03
%S -1,0,-1,-6,4,1,0,-1,0,-1,4,-6,1,4,0,-1,0,-1,4,-6,1,0,-1,0,-1,4,-6,1,
%T 4,4,-6,1,4,-6,4,1,1,1,0,-1,0,-1,-6,4,1,0,-1,0,-1,4,-6,1,4,0,-1,0,-1,
%U 4,-6,1,0,-1,0,-1,4,-6,1,4,4,-6,1,4,-6,4,1,1,1,-9,9,0,-1,-6,4,1,0,-1,0,-1,4
%N First differences of A157680.
%F a(n)= A157680(n+1)-A157680(n).
%K sign,base,less
%O 1,4
%A _Paul Curtz_, Mar 21 2009
%E Edited and extended by _R. J. Mathar_, Apr 08 2009
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