A006205 Number of inequivalent strong starters in cyclic group of order 2n+1. (Formerly M0341)

0, 0, 1, 0, 2, 2, 4, 14, 52, 555, 1257, 7934, 66757, 336297, 2558894, 33642945, 250637748, 1653170339

Offset

1,5

References

CRC Handbook of Combinatorial Designs, 1996, p. 469.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

Table of n, a(n) for n=1..18.

W. L. Kocay et al., On strong starters in cyclic groups, Discrete Math., 56 (1985), 45-60.

V. Linja-aho and Patric R. J. Östergård, Classification of starters, J. Combin. Math. Combin. Comput. 75 (2010), 153-159.

Crossrefs

Cf. A001443.

Sequence in context: A019073 A153959 A308847 * A360194 A268073 A204685

Adjacent sequences: A006202 A006203 A006204 * A006206 A006207 A006208

Keyword

nonn

Author

N. J. A. Sloane

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

Status

approved