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Search: id:A003474
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| A003474 |
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Generalized Euler PHI function.
(Formerly M3541)
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+0
2
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| 1, 4, 18, 32, 160, 324, 1456, 2048, 13122, 25600, 117128, 209952, 913952, 2119936, 9447840, 13107200, 86093440
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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For n>=2 a(n) is the number of n X n circulant invertible matrices over GF(3). - Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 22 2003
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
J. T. B. Beard, Jr. and K. I. West, Factorization tables for x^n-1 over GF(q), Math. Comp., 28 (1974), 1167-1168.
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CROSSREFS
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Cf. A003473.
Sequence in context: A049726 A130656 A053191 this_sequence A095823 A092116 A083969
Adjacent sequences: A003471 A003472 A003473 this_sequence A003475 A003476 A003477
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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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