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Woodall number
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Woodall number : ウィキペディア英語版
Woodall number
In number theory, a Woodall number (Wn) is any natural number of the form
:W_n = n \cdot 2^n - 1
for some natural number ''n''. The first few Woodall numbers are:
:1, 7, 23, 63, 159, 383, 895, … .
==History==
Woodall numbers were first studied by Allan J. C. Cunningham and H. J. Woodall in 1917,〔.〕 inspired by James Cullen's earlier study of the similarly-defined Cullen numbers.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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