A105429 -id:A105429 - cp's OEIS frontend

A105430 Numbers n such that reciprocal of n contains the reverse of n as a string of digits to the immediate right of the decimal point (excluding leading zeros).

3, 61, 175, 571, 2414, 4142, 9011, 359772, 86249511, 535238681, 124396878308, 803878693421, 6126660122361, 13506262793047, 74039726260531, 76729882123723031, 655537561065645251, 882122044899263311

Offset: 1

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Gil Broussar (kikiriki(AT)mindspring.com), Apr 08 2005

nonn
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n for which 10^(2k-1)-n < n*reverse(n) <= 10^(2k-1), where k is the length of n. - Max Alekseyev, Apr 11 2005

			a(3)=175 because 1/175 = 0.005714285...

Cf. A074841, A105429.

fQ[n_] := Block[{lg = Floor[ Log[10, n] + 1]}, IntegerDigits[n] == Reverse[ Take[ RealDigits[1/n, 10, 24][[1]], lg]]]; lst = {}; Do[ If[ fQ[n], AppendTo[lst, n]], {n, 2, 10^7}]; lst (* Robert G. Wilson v, Apr 09 2005 *)

More terms from Max Alekseyev, Apr 11 2005

Further terms from Max Alekseyev, Apr 29 2005

cp's OEIS Frontend

A105430 Numbers n such that reciprocal of n contains the reverse of n as a string of digits to the immediate right of the decimal point (excluding leading zeros).

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