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A105533 Decimal expansion of arctan 1/7. 2
1, 4, 1, 8, 9, 7, 0, 5, 4, 6, 0, 4, 1, 6, 3, 9, 2, 2, 8, 1, 2, 8, 5, 1, 6, 1, 7, 1, 0, 2, 5, 5, 3, 0, 8, 3, 0, 0, 7, 7, 8, 1, 7, 5, 8, 7, 2, 8, 4, 6, 4, 0, 7, 2, 3, 7, 8, 1, 3, 0, 0, 2, 9, 3, 6, 3, 4, 4, 1, 6, 2, 6, 7, 5, 9, 9, 3, 1, 1, 6, 0, 9, 4, 4, 1, 9, 1, 8, 6, 1, 6, 3, 4, 2, 4, 6, 5, 1, 8, 1, 1, 7, 5, 2, 2 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

2*A073000 - arctan(1/7) = 2*A105531 + arctan(1/7) = pi/4

LINKS

Table of n, a(n) for n=0..104.

Machin-Like Formulas from MathWorld

EXAMPLE

.1418970546041639228128516171...

MATHEMATICA

RealDigits[ArcTan[1/7], 10, 120][[1]] (* Harvey P. Dale, Oct 03 2012 *)

CROSSREFS

Sequence in context: A122914 A245566 A016689 * A179193 A124848 A090219

Adjacent sequences:  A105530 A105531 A105532 * A105534 A105535 A105536

KEYWORD

cons,nonn

AUTHOR

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

STATUS

approved

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Last modified October 21 21:46 EDT 2019. Contains 328315 sequences. (Running on oeis4.)