209 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "209" in Chinese language version.

refsWebsite

Global rank Chinese rank

742^nd place

1,026^th place

1web.archive.org

1^st place

1^st place

low place

low place

oeis.org

Sloane, N.J.A. (编). Sequence A001353 (a(n) = 4*a(n-1) - a(n-2) with a(0) = 0, a(1) = 1). The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
Sloane, N.J.A. (编). Sequence A002720 (Number of partial permutations of an n-set; number of n X n binary matrices with at most one 1 in each row and column). The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.

stetson.edu

www2.stetson.edu

埃里希·弗里德曼. What's Special About This Number. stetson.edu. [2016-07-18]. （原始内容存档于2018-02-23）.

web.archive.org

埃里希·弗里德曼. What's Special About This Number. stetson.edu. [2016-07-18]. （原始内容存档于2018-02-23）.