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%I #9 Feb 28 2017 22:59:30
%S 0,1,0,1,-1,0,1,-1,0,-1,0,1,0,1,-1,0,1,-1,0,1,-1,0,-2,0,1,0,1,-1,0,1,
%T -1,0,1,0,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,0,-1,0,1,-1,0,1,-1,0,1,
%U -1,0,1,-1,0,1,-4,0,1,-1,0,1,0,1,-2,0,1,-1,0,1
%N a(n)=common difference of the n-th run of consecutive terms in arithmetic progression in A281579.
%C All terms are less than or equal to 1, and a(n)=1 implies a(n-1)=0.
%C There are no consecutive equal terms.
%H Rémy Sigrist, <a href="/A281772/b281772.txt">Table of n, a(n) for n = 1..10000</a>
%Y Cf. A281579
%K sign
%O 1,23
%A _Rémy Sigrist_, Jan 29 2017
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