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Search: id:A139686
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| A139686 |
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Odd multiplicative orders of 2 modulo primes. |
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+0
2
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| 3, 11, 5, 23, 35, 9, 39, 11, 51, 7, 15, 83, 95, 99, 37, 29, 119, 131, 135, 155, 21, 179, 183, 191, 43, 73, 231, 239, 243, 251, 299, 25, 303, 45, 323, 359, 121, 371, 375, 411, 419, 431, 55, 443, 91, 153, 117, 483, 491, 495, 515, 519, 531, 543, 29, 575, 611, 615, 639
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Subsequence of A014664, consisting of odd elements.
Primes, modulo which 2 has an odd multiplicative order, are given by A014663.
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FORMULA
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a(n) = multiplicative order of 2 modulo A014663(n)
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PROGRAM
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(PARI) forprime(p=3, 10^5, z=znorder(Mod(2, p)); if(z%2, print1(z, ", ")))
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CROSSREFS
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Cf. A014664, A014663.
Sequence in context: A084466 A084462 A134969 this_sequence A130537 A114234 A120299
Adjacent sequences: A139683 A139684 A139685 this_sequence A139687 A139688 A139689
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KEYWORD
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nonn
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AUTHOR
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Max Alekseyev (maxal(AT)cs.ucsd.edu), Apr 29 2008
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