Is it a doubling sequence?
A doubling sequence is an array of numbers where each subsequent number is at least twice the previous number.
Given a pre-sorted list of numbers, determine if the numbers in the list (\$n_{x}\$) have the property that:
\$n_1 \times 2 <= n_2\$
\$n_2 \times 2 <= n_3\ ...\$
and so on until reaching the end of the list.
#Input
A list of numbers.
#Output
Any distinct True or False value.
#Examples:
[10,20,30] > False [10,20,40] > True [1,2,3] > False [1,2,4] > True [1,2,10] > True [1,1] > False [10,1] > False