// multi-utility computation suite · offline · instant · precise
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math.permutation-rank Calculator
Calculates the total number of permutations with or without repetition and ranks a specific permutation in lexicographic order. Lexicographic ranking converts a permutation to a unique integer — useful in combinatorial search and code generation.
Inputs
N
Reference formula or conversion factor shown for context.
R
Reference formula or conversion factor shown for context.
Repeated
Reference formula or conversion factor shown for context.