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%I #7 Apr 19 2015 08:56:30
%S 1,1,-1,1,1,-2,1,-1,1,1,-2,1,1,1,-3,1,-1,1,1,-2,1,-1,1,1,-2,1,1,1,-3,
%T 1,-1,1,1,-2,1,1,1,-3,1,1,1,1,-4,1,-1,1,1,-2,1,-1,1,1,-2,1,1,1,-3,1,
%U -1,1,1,-2,1,-1,1,1,-2,1,1,1,-3,1,-1,1,1,-2,1,1,1,-3,1,1,1,1,-4,1,-1,1,1,-2,1,-1,1,1,-2,1,1,1,-3,1,-1,1,1,-2,1
%N First differences of A007001.
%e a(5) = 1 = A007001(5) - A007001(4) = (3 - 2).
%Y Cf. A007001, A133913, A133914.
%K sign
%O 1,6
%A _Gary W. Adamson_, Sep 28 2007
%E More terms from _Colin Barker_, Apr 19 2015