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A105531 Decimal expansion of arctan 1/3. 2
3, 2, 1, 7, 5, 0, 5, 5, 4, 3, 9, 6, 6, 4, 2, 1, 9, 3, 4, 0, 1, 4, 0, 4, 6, 1, 4, 3, 5, 8, 6, 6, 1, 3, 1, 9, 0, 2, 0, 7, 5, 5, 2, 9, 5, 5, 5, 7, 6, 5, 6, 1, 9, 1, 4, 3, 2, 8, 0, 3, 0, 5, 9, 3, 5, 6, 7, 5, 6, 2, 3, 7, 4, 0, 5, 8, 1, 0, 5, 4, 4, 3, 5, 6, 4, 0, 8, 4, 2, 2, 3, 5, 0, 6, 4, 1, 3, 7, 4, 4, 3, 9, 0, 0, 7 (list; constant; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

arctan(1/3) + A073000 = 2*arctan(1/3) + A105533 = pi/4

LINKS

Machin-Like Formulas from Mathworld

EXAMPLE

.3217505543966421934014046143...

MATHEMATICA

RealDigits[ArcTan[1/3], 10, 120][[1]] (* From Harvey P. Dale, Oct 28 2011 *)

CROSSREFS

Sequence in context: A016556 A067050 A001355 * A129689 A115990 A094531

Adjacent sequences:  A105528 A105529 A105530 * A105532 A105533 A105534

KEYWORD

cons,nonn

AUTHOR

Bryan Jacobs (bryanjj(AT)gmail.com), Apr 12 2005

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Last modified February 18 00:14 EST 2012. Contains 206085 sequences.