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Search: id:A003473
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| A003473 |
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Generalized Euler PHI function.
(Formerly M0875)
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+0
6
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| 1, 2, 3, 8, 15, 24, 49, 128, 189, 480, 1023, 1536, 4095, 6272, 10125, 32768, 65025, 96768, 262143, 491520, 583443, 2095104, 4190209, 6291456, 15728625, 33546240, 49545027, 102760448, 268435455, 331776000
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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a(n) is the number of n X n circulant invertible matrices over GF(2) . - Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 20 2003
a(n) = n*A027362(n). - Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 09 2003
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REFERENCES
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J. T. B. Beard Jr. and K. I. West, Factorization tables for x^n-1 over GF(q), Math. Comp., 28 (1974), 1167-1168.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
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Cf. A086479.
Sequence in context: A135354 A122412 A128035 this_sequence A095373 A056802 A026698
Adjacent sequences: A003470 A003471 A003472 this_sequence A003474 A003475 A003476
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 09 2003
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