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A109514 Let n be an integer consisting of m digits. Then n is a Pithy number if the n-th m-tuple in the decimal digits of Pi is string n. 12
5, 9696, 19781, 199898 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

The next term is greater than 10^7

LINKS

Table of n, a(n) for n=0..3.

David G. Andersen, The Pi-Search Page.

EXAMPLE

5 is a term because the 5th single digit in Pi is 5. Number 9696 is a term because the 9696th quadruplet in the decimal digits of Pi is 9696. (cf. 3.14159...)

MATHEMATICA

PithyNumbersWith3[m_] := Module[{cc = m(10^m)+m, sol, aa}, sol = Partition[RealDigits[Pi, 10, cc] // First, m]; Do[aa = FromDigits[sol[[i]]]; If[aa==i, Print[{i, aa}]], {i, Length[sol]}]; ] Example: PithyNumbersWith3[5] produces all 5-digit Pithy numbers

CROSSREFS

Cf. A109513, A057679, A057680.

Sequence in context: A067816 A076629 A052027 * A022918 A212617 A160741

Adjacent sequences:  A109511 A109512 A109513 * A109515 A109516 A109517

KEYWORD

base,more,nonn

AUTHOR

Colin Rose, Jul 01 2005

STATUS

approved

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Last modified May 30 03:33 EDT 2017. Contains 287305 sequences.