%I #17 Sep 11 2017 09:55:54
%S 1,2,2,-3,6,3,3,-10,5,10,5,5,5,-28,7,7,7,14,7,7,7,7,7,-66,11,11,11,11,
%T 11,22,11,11,11,11,11,-130,13,13,13,13,13,13,13,13,13,26,13,13,13,13,
%U 13,-204,17,17,17,17,17,17,17,17,17,17,17,34,17,17,17,17,17,-304,19
%N First differences of A291577.
%C Looks like an EKG sequence.
%F a(n) = A291577(n+1) - A291577(n).
%Y Cf. A291577.
%K sign
%O 0,2
%A _Enrique Navarrete_, Sep 04 2017