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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

%I

%S 5,9696,19781,199898

%N 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.

%C The next term is greater than 10^7

%H David G. Andersen, <a href="http://www.angio.net/pi/piquery">The Pi-Search Page</a>.

%e 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...)

%t 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

%Y Cf. A109513, A057679, A057680.

%K base,more,nonn

%O 0,1

%A _Colin Rose_, Jul 01 2005

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Last modified December 10 20:48 EST 2017. Contains 295856 sequences.