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A103492 Multiplicative suborder of 6 (mod 2n+1) = sord(6, 2n+1). +0
1
0, 0, 1, 1, 0, 5, 6, 0, 8, 9, 0, 11, 5, 0, 7, 3, 0, 2, 2, 0, 20, 3, 0, 23, 7, 0, 13, 10, 0, 29, 30, 0, 12, 33, 0, 35, 18, 0, 5, 39, 0, 41, 16, 0, 44, 12, 0, 9, 6, 0, 5, 51, 0, 53, 54, 0, 56, 11, 0, 16, 55, 0, 25, 63, 0, 65, 18, 0, 68, 23, 0, 60, 14, 0, 37, 75, 0, 6, 78, 0, 22, 27, 0, 83, 78, 0, 43 (list; graph; listen)
OFFSET

0,6

COMMENT

a(n) is minimum e for which 6^e = +/-1 mod 2n+1, or zero if no e exists.

REFERENCES

H. Cohen, Course in Computational Algebraic Number Theory, Springer, 1993, p. 25, Algorithm 1.4.3

LINKS

H. J. Smith, XICalc - Extra Precision Integer Calculator.

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics, Multiplicative Order.

S. Wolfram, Algebraic Properties of Cellular Automata (1984), Appendix B.

CROSSREFS

Adjacent sequences: A103489 A103490 A103491 this_sequence A103493 A103494 A103495

Sequence in context: A092161 A088602 A021869 this_sequence A105580 A047774 A046614

KEYWORD

easy,nonn

AUTHOR

Harry J. Smith (hjsmithh(AT)sbcglobal.net), Feb 11 2005

page 1

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Last modified January 8 02:43 EST 2009. Contains 152824 sequences.


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