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A338308 a(n) is the smallest positive integer m such that 2^n appears as the denominator of a convergent to sqrt(m). 2
1, 2, 3, 15, 61, 32, 159, 94, 393, 1185, 2321, 717, 13793, 13591, 18212, 50915, 41780, 10445, 246294, 1566182, 614515, 1453153, 4593605, 12484235, 16905922, 5556569, 58500158, 265210068, 66302517, 293352098, 396835071, 828594093 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..31.

FORMULA

a(n) = A338307(2^n).

CROSSREFS

Cf. A338307.

Sequence in context: A143885 A172012 A323709 * A047014 A027519 A245107

Adjacent sequences:  A338305 A338306 A338307 * A338309 A338310 A338311

KEYWORD

nonn,hard

AUTHOR

Max Alekseyev, Oct 21 2020

STATUS

approved

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Last modified September 19 00:22 EDT 2021. Contains 347549 sequences. (Running on oeis4.)