Hi, your logic is correct but 'nchoosek' hogs memory space. there is a better way...
Who knows the last digit of pi?
Determine if input is a Narcissistic number
Determine the number of odd integers in a vector
Find last zero for each column
Sum the 'edge' values of a matrix
Easy Sequences 36: Hyperbolic Lattice Points
Easy Sequences 24: Number of Coprime Lattice Points
Easy Sequences 47: Boxes with Prime Edges
Easy Sequences 50: Blocked Gaussian Integers
Easy Sequences 16: Volume of Embedded Octahedron
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