Including a value where x<=15 and the formula is true (like the x=8; n=2 example in your problem description) will make this solution wrong.
Hack, as there is an error in test suite 5. x=15 and n=5 should result in 'false'
This like gave me the celebrity badge! Woo-hoo!
Select every other element of a vector
Return the 3n+1 sequence for n
radius of a spherical planet
Matrix indexing with two vectors of indices
Accessing value of variable whose name is stored in another variable as string.
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