OEIS link for a description of lunar arithmetic
Simply take the larger digit when adding and take the smaller digit when multiplying.
give nth decimal place of pi
Back to basics 8 - Matrix Diagonals
Set some matrix elements to zero
Matrix multiplication across rows
Solving Quadratic Equations (Version 1)
Repeat string n times
Find two triangular numbers whose sum is input.
Hexagonal numbers on a spiral matrix
Number of Even Elements in Fibonacci Sequence
Recaman Sequence - III
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