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Search: id:A138305
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| A138305 |
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Irregular triangle of prime primitive roots of prime(n). |
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+0
5
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| 2, 2, 3, 3, 5, 2, 7, 2, 7, 11, 3, 5, 7, 11, 2, 3, 13, 5, 7, 11, 17, 19, 2, 3, 11, 19, 3, 11, 13, 17, 2, 5, 13, 17, 19, 7, 11, 13, 17, 19, 29, 3, 5, 19, 29, 5, 11, 13, 19, 23, 29, 31, 41, 43, 2, 3, 5, 19, 31, 41, 2, 11, 13, 23, 31, 37, 43, 47, 2, 7, 17, 31, 43, 59, 2, 7, 11, 13, 31, 41, 61, 7
(list; graph; listen)
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OFFSET
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2,1
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COMMENT
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The length of row n is A138304(n).
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LINKS
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T. D. Noe, Rows n=2..100 of triangle, flattened
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EXAMPLE
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2; 2,3; 3,5; 2,7; 2,7,11; 3,5,7,11
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MATHEMATICA
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Flatten[Table[p=Prime[n]; Select[Prime[Range[n-1]], MultiplicativeOrder[ #, p]==p-1&], {n, 100}]]
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CROSSREFS
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Cf. A002233 (least prime primitive root), A060749 (triangle of primitive roots of primes).
Sequence in context: A165129 A113773 A060749 this_sequence A079375 A069933 A102347
Adjacent sequences: A138302 A138303 A138304 this_sequence A138306 A138307 A138308
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KEYWORD
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nonn
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AUTHOR
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T. D. Noe (noe(AT)sspectra.com), Mar 14 2008
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