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A074744 Values of k corresponding to A073726. 3
1, 1, 1, 2, 1, 1, 4, 3, 2, 1, 3, 7, 3, 2, 1, 5, 3, 3, 2, 3, 13, 2, 11, 4, 3, 5, 9, 3, 24, 7, 19, 1, 1, 18, 9, 6, 25, 9, 4, 13, 13, 38, 2, 21, 11, 6, 11, 37, 9, 16, 15, 31, 10, 9, 33, 8, 18, 2, 37, 1, 5, 3, 29, 57, 11, 21, 29, 21, 52, 27, 53 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

If there is more than one choice for k then the smallest value is taken.

LINKS

Table of n, a(n) for n=1..71.

A. J. Menezes, P. C. van Oorschot and S. A. Vanstone, Handbook of Applied Cryptography, CRC Press, 1996; see Table 4.8.

MATHEMATICA

f[n_] := For[k = 1, k <= n - 1, k++, If[PrimitivePolynomialQ[x^n + x^k + 1, 2], Print[k]; Return[k]]];

DeleteCases[f /@ Range[201], Null] (* Jean-Fran├žois Alcover, Aug 19 2019 *)

CROSSREFS

Sequence in context: A264831 A264728 A306790 * A010360 A262357 A112744

Adjacent sequences:  A074741 A074742 A074743 * A074745 A074746 A074747

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Sep 06 2002

EXTENSIONS

a(12) - a(71) from Nathaniel Johnston, Apr 26 2011

STATUS

approved

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Last modified October 19 04:40 EDT 2019. Contains 328211 sequences. (Running on oeis4.)