"This is a nice question !"
"It looks to me like you go from one number to the next by"
"dividing by 4:"
\qquad \qquad \qquad \qquad 3328 \div 4 = 832, \qquad 832 \div 4 = 208.
"So, to get the next 2 numbers, we continue the same:"
\qquad \qquad \qquad \qquad 208 \div 4 = 52, \qquad 52 \div 4 = 13.
"So, the next 2 numbers are:"
\qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \quad \quad 52 \qquad "and" \qquad 13.
"[Extra Note: because 13 is not divisible by 4, we cannot go"
"any further, unless we want to include fractions as Ok.]"