id:A060689 - OEIS Search Results

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Number of non-Abelian groups of order n.

+0
4

0, 0, 0, 0, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 9, 0, 3, 0, 3, 1, 1, 0, 12, 0, 1, 2, 2, 0, 3, 0, 44, 0, 1, 0, 10, 0, 1, 1, 11, 0, 5, 0, 2, 0, 1, 0, 47, 0, 3, 0, 3, 0, 12, 1, 10, 1, 1, 0, 11, 0, 1, 2, 256, 0, 3, 0, 3, 0, 3, 0, 44, 0, 1, 1, 2, 0, 5, 0, 47, 10, 1, 0, 13, 0, 1, 0, 9, 0, 8, 0, 2 (list; graph; listen)

	OFFSET	`1,8`
	COMMENT	`a(n) = 0 iff n belongs to sequence A051532.`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..2015` `Index entries for sequences related to groups`
	FORMULA	`a(n) = A000001(n) - A000688(n)`
	EXAMPLE	`a(6) = 1 because the only non-Abelian group of order 6 is the symmetric group S_3.`
	CROSSREFS	`Cf. A000001, A000688.` `Sequence in context: A065334 A007814 A083280 this_sequence A053119 A108045 A127368` `Adjacent sequences: A060686 A060687 A060688 this_sequence A060690 A060691 A060692`
	KEYWORD	`nonn`
	AUTHOR	`Ahmed Fares (ahmedfares(AT)my-deja.com), Apr 19 2001`
	EXTENSIONS	`Corrected by Avi Peretz (njk(AT)netvision.net.il), Apr 21 2001`

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Last modified September 6 00:03 EDT 2008. Contains 143485 sequences.

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