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a(n)*|a(n)| gives the first difference of A230383.
3

%I #6 Oct 25 2013 12:24:58

%S 1,2,-1,3,-2,4,-3,5,6,-7,-5,7,-4,8,-9,10,-8,9,-11,12,-10,-6,11,13,-17,

%T 14,-13,15,-16,17,-15,16,-12,18,-21,19,-20,21,-19,22,-23,20,-18,23,

%U -24,25,-26,24,-22,26,-28,27,-25,28,29,-42,30,-29,31,-30,32,-33

%N a(n)*|a(n)| gives the first difference of A230383.

%C This sequence contains only distinct terms, different from 0.

%H Paul Tek, <a href="/A230560/b230560.txt">Table of n, a(n) for n = 1..10000</a>

%Y Cf. A230383, A230565.

%K sign

%O 1,2

%A _Paul Tek_, Oct 23 2013