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A153723 Greatest number m such that the fractional part of (Pi-2)^A153719(m) >= 1-(1/m). 8
1, 1, 1, 3, 16, 24, 45, 158, 410, 946, 1182, 8786, 16159, 20188, 61392, 78800, 78959, 217556 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..18.

FORMULA

a(n) = floor(1/(1-fract((Pi-2)^A153719(n)))), where fract(x) = x-floor(x).

EXAMPLE

a(5) = 16, since 1-(1/17) = 0.941176... > fract((Pi-2)^A153719(5)) = fract((Pi-2)^5) = 0.9389... >= 0.9375 = 1-(1/16).

MATHEMATICA

$MaxExtraPrecision = 100000;

A153719 = {1, 2, 3, 4, 5, 39, 56, 85, 557, 911, 2919, 2921, 4491,

   11543, 15724, 98040, 110932, 126659};

Floor[1/(1 - FractionalPart[(Pi - 2)^A153719])] (* Robert Price, Apr 18 2019 *)

CROSSREFS

Cf. A153663, A153671, A153679, A153687, A153695, A091560, A153711, A153719, A154130.

Sequence in context: A028687 A201274 A101132 * A091273 A256931 A101405

Adjacent sequences:  A153720 A153721 A153722 * A153724 A153725 A153726

KEYWORD

nonn,more

AUTHOR

Hieronymus Fischer, Jan 06 2009

STATUS

approved

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Last modified October 18 22:26 EDT 2019. Contains 328211 sequences. (Running on oeis4.)