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%I #5 Oct 14 2017 10:46:41
%S 2,3,5,-7,11,-13,17,19,-31,23,29,-47,37,-41,43,53,-83,59,-71,61,67,
%T -127,73,79,-157,89,97,-173,101,-103,107,-109,113,131,-241,137,139,
%U -271,149,-151,163,167,-337,179,181,-349,191,193,-383,197,-199,211,223,-431
%N First difference of A293666.
%C For any n > 0, |a(n)| is prime.
%e a(10) = A293666(11) - A293666(10) = 30 - 7 = 23.
%Y Cf. A293666.
%K sign
%O 1,1
%A _Rémy Sigrist_, Oct 14 2017
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