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A257777 Decimal expansion of atan(e). 6
1, 2, 1, 8, 2, 8, 2, 9, 0, 5, 0, 1, 7, 2, 7, 7, 6, 2, 1, 7, 6, 0, 4, 6, 1, 7, 6, 8, 9, 1, 5, 7, 9, 7, 9, 4, 1, 7, 3, 9, 1, 3, 1, 9, 4, 9, 4, 6, 8, 1, 5, 6, 5, 0, 5, 0, 4, 9, 6, 6, 0, 2, 6, 2, 9, 4, 8, 1, 7, 8, 2, 1, 6, 3, 0, 0, 7, 6, 0, 7, 6, 3, 7, 6, 1, 9, 6, 9, 1, 6, 8, 1, 5, 5, 7, 7, 2, 1, 3, 0, 7, 0, 2, 8, 6 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The slope of the unique straight line passing through the origin which kisses the exponential function y=exp(x), i.e., the angle (in radians) the tangent line subtends with the X axis. The kissing point coordinates are (1,e).

LINKS

Stanislav Sykora, Table of n, a(n) for n = 1..2000

EXAMPLE

1.21828290501727762176046176891579794173913194946815650504966...

In degrees:

69.8024687104273501888256538674056059123933374409546355361989953970...

MATHEMATICA

RealDigits[ArcTan[E], 10, 105][[1]] (* Vaclav Kotesovec, Jun 02 2015 *)

PROG

(PARI) atan(exp(1))

CROSSREFS

Cf. A001113, A248618, A257775, A257776, A257896, A258428.

Sequence in context: A130562 A152250 A154175 * A011208 A001281 A232535

Adjacent sequences:  A257774 A257775 A257776 * A257778 A257779 A257780

KEYWORD

nonn,cons,easy

AUTHOR

Stanislav Sykora, May 12 2015

STATUS

approved

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Last modified June 23 18:19 EDT 2017. Contains 288668 sequences.