A338320 a(n) is the smallest positive integer m such that 2^n appears as the denominator of a semiconvergent to sqrt(m).

1, 2, 3, 7, 11, 32, 8, 94, 227, 359, 623, 717, 551, 4925, 3200, 800, 3726, 10445, 6577, 49313, 341409, 496085, 305088, 274058, 269008, 3502253, 10740040, 31388327, 63502569, 28372805, 14563552

Offset

0,2

Comments

a(n) <= A338308(n).

Links

Table of n, a(n) for n=0..30.

Formula

a(n) = A338319(2^n).

Crossrefs

Cf. A338307, A338308, A338319.

Sequence in context: A323067 A140108 A034295 * A056354 A072534 A056292

Adjacent sequences: A338317 A338318 A338319 * A338321 A338322 A338323

Keyword

nonn,hard

Author

Max Alekseyev, Oct 22 2020

Status

approved