A001443 Number of strong starters in cyclic group of order 2n+1.

0, 0, 2, 0, 4, 8, 32, 224, 800, 6660, 27554, 158680, 1201626, 9415980, 76761968, 672858900, 6015305136, 59514095596

Offset

1,3

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.

Links

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

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

Crossrefs

Cf. A006205.

Sequence in context: A295321 A372002 A366363 * A195287 A070015 A021492

Adjacent sequences: A001440 A001441 A001442 * A001444 A001445 A001446

Keyword

nonn,more

Author

N. J. A. Sloane

Extensions

Corrected and extended by Vesa Linja-aho (vesa.linja-aho(AT)tkk.fi), May 06 2009

Status

approved