# Find the first $5$ terms of the series given by $a_1=a_2=2,\:a_n=a_{n-1}-1\:\:for\:\:n>2$
$\begin{array}{1 1}2,2,0,-1,-2 \\2,2,-1,0,1 \\ 2,2,1,-1,-2 \\ 2,2,1,0,-1\end{array}$