OEIS link for a description of lunar arithmetic
Simply take the larger digit when adding and take the smaller digit when multiplying.
Energy of a photon
Removing rows from a matrix is easy - but what about inserting rows?
Calculate the derivative of a polynomial
Compute LOG(1+X) in natural log
Divisible by 7
Hexagonal numbers on a spiral matrix
Mean = Standard Deviation
unique with nan
Modular multiplicative inverse
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