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An introduction to probability theory and its applications. Vol. I. (English) Zbl 0039.13201

New York: John Wiley & Sons. 419 p. (1950).

MSC:

60-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to probability theory

Citations:

Zbl 0039.13301

Online Encyclopedia of Integer Sequences:

From area of cyclic polygon of 2n + 1 sides.
a(n) = (2n+1)!/n!^2.