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%I #6 Feb 17 2015 00:23:45
%S 3,4,4,6,6,2,8,4,4,6,4,8,4,2,12,2,10,6,6,6,6,2,18,-2,6,10,8,6,6,-2,14,
%T 0,18,2,8,8,4,10,6,6,10,0,12,2,14,0,0,14,18,12,6,6,6,2,6,0,20,0,8
%N First differences of A072473.
%H Zak Seidov, <a href="/A255171/b255171.txt">Table of n, a(n) for n = 1..1000</a>
%F a(n) = A072473(n+1) - A072473(n).
%Y Cf. A072473, A072715.
%K sign
%O 1,1
%A _Zak Seidov_, Feb 15 2015
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