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A061564 Numbers n such that the repeating part of the decimal expansion of 1/n (omitting leading or trailing zeros) forms a prime number. 1
3, 12, 18, 27, 30, 33, 36, 45, 48, 75, 120, 180, 192, 198, 270, 277, 288, 300, 330, 333, 360, 369, 418, 437, 450, 480, 495, 653, 673, 750, 768, 802, 874, 897, 899, 909, 941, 982, 985, 1042, 1152, 1200, 1437, 1451, 1501, 1529, 1546, 1584, 1618, 1623, 1693 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..51.

Index entries for sequences related to decimal expansion of 1/n

EXAMPLE

1/18=.05555555..., the repeating part is 5, so 18 is in the sequence.

CROSSREFS

Sequence in context: A125821 A239052 A063229 * A166038 A052637 A120623

Adjacent sequences:  A061561 A061562 A061563 * A061565 A061566 A061567

KEYWORD

easy,nonn,base

AUTHOR

Brian Wallace (wallacebrianedward(AT)yahoo.co.uk), May 18 2001

EXTENSIONS

Corrected and extended by Klaus Brockhaus, May 19 2001

More terms from Lior Manor Nov 26 2001

STATUS

approved

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Last modified November 22 05:36 EST 2017. Contains 295076 sequences.