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A119666 Each term k provides a value of (sum-of-digits of 5^k)/k that is closer to Pi than the previous value. 2
1, 2, 4, 6, 8, 139, 309, 390, 819, 2868, 6751, 8045, 9414, 15008, 15375, 56839, 84383, 151286, 307650, 516962, 533919, 2021009 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

Hans Havermann, Search for the next term.

MATHEMATICA

a = Infinity; fn = 1; p = N[Pi, 24]; Do[ fn = 5fn; b = N[ Abs[Pi - Plus @@ IntegerDigits@fn/n], 24]; If[b < a, a = b; Print@n], {n, 711000}] (* Robert G. Wilson v, Sep 08 2007 *)

CROSSREFS

Sequence in context: A228327 A081507 A115336 * A087302 A351777 A030149

Adjacent sequences:  A119663 A119664 A119665 * A119667 A119668 A119669

KEYWORD

base,fini,nonn,more

AUTHOR

Hans Havermann, Jul 29 2006, Jul 31 2006, Aug 05 2006

STATUS

approved

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Last modified May 21 21:43 EDT 2022. Contains 353929 sequences. (Running on oeis4.)