A153724 Greatest number m such that the fractional part of (Pi-2)^A153720(n) >= 1-(1/m).

1, 16, 8, 158, 946, 8786, 16159, 20188, 61392, 34039, 31425, 59154, 217556

Offset

1,2

Links

Table of n, a(n) for n=1..13.

Formula

a(n):=floor(1/(1-fract((Pi-2)^A153720(n)))), where fract(x) = x-floor(x).

Example

a(4)=158, since 1-(1/159) = 0.993710... > fract((Pi-2)^A153720(4)) = fract(Pi^85) = 0.993693... >= 0.993670... = 1-(1/158).

Mathematica

A153720 = {1, 5, 8, 85, 911, 2921, 4491, 11543, 15724, 27683, 29921,
   37276, 126659};
Table[Floor[1/(1 - FractionalPart[(Pi - 2)^A153720[[n]]])], {n, 1,
Length[A153720]}] (* Robert Price, May 10 2019 *)

Crossrefs

Cf. A153664, A153672, A153680, A153688, A153696, A153704, A153712, A153720, A154130.

Sequence in context: A299584 A213558 A164703 * A183396 A070535 A070579

Adjacent sequences: A153721 A153722 A153723 * A153725 A153726 A153727

Keyword

nonn,more

Author

Hieronymus Fischer, Jan 06 2009

Status

approved