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%I #8 Jun 21 2021 06:07:13
%S 1,2,6,6,30,4,72,72,210,132,132,114,594,48,354,1860,3942,2574,2574,
%T 2574,20910,20910,9600,9600
%N Common differences of arithmetic progressions in A086786.
%F a(n) = A086786(n, 2) - A086786(n, 1) = (A087309(n) - A087308(n))/(n - 1).
%Y Cf. A086786, A087308, A087309.
%K nonn,more
%O 2,2
%A _Amarnath Murthy_, Sep 02 2003
%E Edited and extended by _David Wasserman_, Jan 08 2006
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