Question 958579
Looks like alternating signs of reciprocals of integers,
{{{1/1}}}
{{{-1/2}}}
{{{1/3}}}
{{{-1/4}}}
.
.
.
{{{A[n]=(-1)^(n+1)/n}}}
{{{A[10]=(-1)^11/10}}}
{{{A[10]=-1/10}}}