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A246719 Smallest natural number m for which there are exactly n distinct values k such that 0 < k < m^2 and 2^k - 1 is divisible by m^2. 0
1, 3, 7, 15, 113, 65, 31, 91, 73, 39, 21, 331, 267, 55, 217, 435, 201 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Smallest odd number of the form 2q - 1 such that A246702(q) - n.

LINKS

Table of n, a(n) for n=1..17.

CROSSREFS

Cf. Numbers of the form 2n - 1 suth that A246702(n) = i: number 1 (i = 0), A167791 (i = 1), A246702 (i = 2), A246755 (i = 3).

Sequence in context: A096422 A154795 A193831 * A077775 A197594 A206851

Adjacent sequences:  A246716 A246717 A246718 * A246720 A246721 A246722

KEYWORD

nonn,more

AUTHOR

Juri-Stepan Gerasimov, Nov 15 2014

EXTENSIONS

Name corrected by Antti Karttunen, Nov 18 2014

STATUS

approved

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Last modified September 29 14:39 EDT 2020. Contains 337432 sequences. (Running on oeis4.)