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A006205
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Number of inequivalent strong starters in cyclic group of order 2n+1.
(Formerly M0341)
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1
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0, 0, 1, 0, 2, 2, 4, 14, 52, 555, 1257, 7934, 66757, 336297, 2558894, 33642945, 250637748, 1653170339
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,5
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REFERENCES
| CRC Handbook of Combinatorial Designs, 1996, p. 469.
W. L. Kocay et al., On strong starters in cyclic groups, Discrete Math., 56 (1985), 45-60.
Classification of starters, V. Linja-aho and P. R. J. Ostergard, Journal of Combinatorial Mathematics and Combinatorial Computing, to appear. [From Vesa Linja-aho (vesa.linja-aho(AT)tkk.fi), May 06 2009]
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| Classification of starters, V. Linja-aho and P. R. J. Ostergard, Journal of Combinatorial Mathematics and Combinatorial Computing, to appear. [From Vesa Linja-aho (vesa.linja-aho(AT)tkk.fi), May 06 2009]
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FORMULA
| Cf. A001443.
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CROSSREFS
| Sequence in context: A019072 A019073 A153959 * A204685 A205161 A205310
Adjacent sequences: A006202 A006203 A006204 * A006206 A006207 A006208
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Better definition from Vesa Linja-aho (vesa.linja-aho(AT)tkk.fi), Jul 31 2008
Corrected and extended by Vesa Linja-aho (vesa.linja-aho(AT)tkk.fi), May 06 2009
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