A338308 a(n) is the smallest positive integer m such that 2^n appears as the denominator of a convergent to sqrt(m).

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

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