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单词
subfactorial
释义
subfactorial
[´sǝb´fak`tȯr·ē·ǝl]
MATHEMATICS
For an integer
n
, the number that is expressed as
n
!{(1/2!)= - = (1/3!) + (1/4!) - . . . + [(-1)
n
/
n
!]}.
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