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A119569 Number of non-isomorphic Con-Cos groups of order n. 2
1, 1, 1, 2, 1, 2, 1, 5, 2, 2, 1, 3, 1, 2, 1, 5, 1, 4, 1, 3, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

A Con-Cos group is a group with a normal subgroup such that the cosets of this subgroup coincide with the conjugacy classes.

REFERENCES

A. S. Muktibodh, "Generalized Con-Cos grpups" Advances in Algebra, Proc. of ICM sattelite conf. Hong Kong, 2002, 434-441.

A. S. Muktibodh, "Con-Cos groups" Review Bull. of Calcutta Math. Soc., Vol. 11, 53-56, 2003

LINKS

Table of n, a(n) for n=1..22.

CROSSREFS

Sequence in context: A159829 A224763 A128515 * A318475 A066083 A128644

Adjacent sequences:  A119566 A119567 A119568 * A119570 A119571 A119572

KEYWORD

nonn

AUTHOR

A. S. Muktibodh (amukti2000(AT)yahoo.com), Jun 01 2006

STATUS

approved

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Last modified February 25 20:52 EST 2020. Contains 332258 sequences. (Running on oeis4.)