STATUS
editing
approved
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Revision History for A021243
(Bold, blue-underlined text is an addition; faded, red-underlined text is aShowing entries 1-10 | older changes
LINKS
<a href="/index/Rec#order_07">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 1).
STATUS
approved
editing
STATUS
editing
approved
FORMULA
a(n) = (1/49)*{13*(n mod 7)+27*[(n+1) mod 7]+34*[(n+2) mod 7]-43*[(n+3) mod 7]+27*[(n+4) mod 7]-22*[(n+5) mod 7]+6*[(n+6) mod 7]}, with n>=0. [Paolo P. Lava, Oct 05 2009]
STATUS
approved
editing
STATUS
reviewed
approved
STATUS
proposed
reviewed
STATUS
editing
proposed
LINKS
Joerg Arndt, <a href="http://jjj.de/arctan/arctanpage.html">Arctan relations for Pi.</a>
FORMULA
From Jean-François Alcover, Sep 14 2015: (Start)
1/239 = 4649 / 1111111. - Jean-François Alcover, Sep 14 2015
1/239 = 4649 / 1111111. (End)
LINKS
Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Machin-LikeFormulas.html">Machin-Like Formulas</a>
FORMULA
a(n) = (1/49)*{13*(n mod 7)+27*[(n+1) mod 7]+34*[(n+2) mod 7]-43*[(n+3) mod 7]+27*[(n+4) mod 7]-22*[(n+5) mod 7]+6*[(n+6) mod 7]}, with n>=0 . [From __Paolo P. Lava_, Oct 05 2009]
STATUS
proposed
editing