%I #13 May 26 2020 06:31:45
%S 0,-1,2,-2,4,-3,6,-4,0,-5,10,-6,12,-7,14,-8,0,-9,18,-10,0,-11,22,-12,
%T 0,-13,26,-14,0,-15,30,-16,0,-17,34,-18,36,-19,38,-20,0,-21,42,-22,0,
%U -23,0,-24,48,-25,0,-26,52,-27,0,-28,56,-29,0,-30,60,-31,0,-32,64,-33,66,-34,68,-35,0,-36,72,-37
%N First differences of A334950.
%C The absolute value of a(n) is also the length of the n-th vertical-line-segment in the diagram of A334950.
%H <a href="/index/Rea#Recaman">Index entries for sequences related to Recamán's sequence</a>
%F a(2k+1) = -(k + 1), k >= 0.
%Y Cf. A001478, A005132, A334950, A334951.
%K sign
%O 0,3
%A _Omar E. Pol_, May 17 2020