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%I #8 Aug 08 2014 14:46:49
%S 1,1,-2,2,-1,1,-2,1,1,-1,-1,2,-2,1,-1,2,-1,1,-2,1,1,-1,-1,1,1,-2,1,-1,
%T 2,-1,1,-2,2,-1,-1,2,-2,1,1,-1,-1,1,1,-2,2,-1,-1,2,-2,1,-1,2,-1,1,-2,
%U 1,1,-1,-1,1,1,-2,1,-1,2,-1,1,-2,2,-1,-1,1,1,-2
%N First differences of Arshon's sequence, cf. A099054.
%C Also first differences of A219762;
%C a(n) = A099054(n+1) - A099054(n) = A219762(n+2) - A219762(n+1).
%H Reinhard Zumkeller, <a href="/A241418/b241418.txt">Table of n, a(n) for n = 0..10000</a>
%o (Haskell)
%o a241418 n = a241418_list !! n
%o a241418_list = zipWith (-) (tail a099054_list) a099054_list
%Y Cf. A099054, A219762.
%K sign
%O 0,3
%A _Reinhard Zumkeller_, Aug 08 2014
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