I'm not sure what is the point of eliminating 'ifs'? At any rate they can be easily replaced by e.g. 'while' loops, so in my opinion you should either eliminate both of them or none.
Again, the best way to generate such a sequence is using depth-first search or recursion. By prohibiting the usage of IFs, all solutions are inefficient (because we can't cut the tree, and are forced to follow all branches).
Back to basics 17 - white space
Find the maximum number of decimal places in a set of numbers
Find out missing number from a vector of 9 elements
Derivative of polynomial
Volume of a Simplex
Seperate array to small section according to its index position
Successive zeros (harder)
Return fibonacci sequence do not use loop and condition
Find the right number make the equation
Find the maximum two numbers of every column of a matrix
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