double factorial
product of all the integers from 1 up to the integral input of the function that have the same parity as this input
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double factorial
Summary
double factorial is a function[1]. It draws 334 Wikipedia views per month (function category, ranking #16 of 114).[2]
Key Facts
- double factorial's instance of is recorded as function[3].
- double factorial's instance of is recorded as multifactorial[4].
- double factorial's Freebase ID is recorded as /m/0rytzgg[5].
- double factorial's OEIS ID is recorded as A006882[6].
- double factorial's codomain is recorded as positive integer[7].
- double factorial's partial function domain is recorded as integer[8].
- double factorial's different from is recorded as iterated factorial[9].
- double factorial's defining formula is recorded as n!! = \prod_{k=0}^{\left\lceil\frac{n}{2}\right\rceil - 1} (n-2k)[10].
- double factorial's MathWorld ID is recorded as DoubleFactorial[11].
- double factorial's nLab ID is recorded as double factorial[12].
- double factorial's maintained by WikiProject is recorded as WikiProject Mathematics[13].
- double factorial's Microsoft Academic ID is recorded as 28764420[14].
- double factorial's ScienceDirect topic ID is recorded as mathematics/double-factorial[15].
Why It Matters
double factorial draws 334 Wikipedia views per month (function category, ranking #16 of 114).[2] It has Wikipedia articles in 12 language editions, a strong signal of global cultural recognition.[16] It is known by 11 alternative names across languages and contexts.[17]