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A137310 Numbers n such that a type-4 Gaussian normal basis over GF(2^n) exists. 1
1, 3, 7, 9, 13, 15, 25, 37, 43, 45, 49, 67, 73, 79, 87, 93, 97, 105, 115, 127, 135, 139, 153, 163, 165, 169, 175, 177, 189, 193, 199, 205, 207, 213, 219, 235, 265, 277, 279, 303, 307, 309, 319, 325, 343, 345, 363, 373, 387, 405, 409, 417, 423, 433, 435, 465, 469 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A type-t Gaussian normal basis exists for GF(2^n) if p=n*t+1 is prime and gcd(n,(p-1)/ord(2 mod p))==1.

LINKS

Table of n, a(n) for n=1..57.

CROSSREFS

Cf. A136415.

Sequence in context: A204085 A230076 A120226 * A118567 A118561 A309406

Adjacent sequences:  A137307 A137308 A137309 * A137311 A137312 A137313

KEYWORD

nonn

AUTHOR

Joerg Arndt, Apr 05 2008

STATUS

approved

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Last modified June 24 01:47 EDT 2021. Contains 345404 sequences. (Running on oeis4.)