A066295 - OEIS

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A066295

Number of Abelian groups of order n minus the number of non-Abelian groups of order n.

1, 1, 1, 2, 1, 0, 1, 1, 2, 0, 1, -1, 1, 0, 1, -4, 1, -1, 1, -1, 0, 0, 1, -9, 2, 0, 1, 0, 1, -2, 1, -37, 1, 0, 1, -6, 1, 0, 0, -8, 1, -4, 1, 0, 2, 0, 1, -42, 2, -1, 1, -1, 1, -9, 0, -7, 0, 0, 1, -9, 1, 0, 0, -245, 1, -2, 1, -1, 1, -2, 1, -38, 1, 0, 1, 0, 1, -4, 1, -42, -5, 0, 1, -11, 1, 0, 1, -6, 1, -6, 1, 0, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..2015`
	FORMULA	`a(n) = A000688(n) - A060689(n)`
	CROSSREFS	`Cf. A000688, A060689, A000001.` `Sequence in context: A006842 A060505 A035188 * A035154 A113446 A121450` `Adjacent sequences: A066292 A066293 A066294 * A066296 A066297 A066298`
	KEYWORD	`sign`
	AUTHOR	`Sharon Sela (sharonsela(AT)hotmail.com), Jan 01 2002`
	EXTENSIONS	`Edited by Dean Hickerson (dean.hickerson(AT)yahoo.com), Mar 04 2002` `More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 05 2003`

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Last modified February 15 05:26 EST 2012. Contains 205694 sequences.