What this calculator does
Count the odd permutations of a set of distinct elements.
How it works
The calculator evaluates odd permutations = n! ÷ 2 for n ≥ 2. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
1-
?n=Number of elements nNumber · Required · Default: 6
Outputs
2-
permutationsOdd permutationsText · Primary output
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totalPermutationsTotal permutations n!Text
Inputs and results
The inputs are Number of elements n. Results include Odd permutations, Total permutations n!.