This problem has been polished along with an enhanced test suite.
Return the 3n+1 sequence for n
Remove the air bubbles
Numbers with prime factors 2, 3 and 5.
Column norms of a matrix
Duplicate each element of a vector.
Find product of eigenvalues of n*n magic matrix.
Multiply two polynomials p and q given in in vector representation.
Set x value to each odd index of vector y.
Find scalar product of two polynomials a and b, given as vector array.
For given vectors x,y find coresponding spline coefficients.
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