A060643 - OEIS

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A060643

Number of conjugacy classes in the symmetric group S_n that have even number of elements.

0, 0, 1, 3, 5, 7, 11, 20, 28, 38, 52, 73, 97 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	COMMENTS	`The total number of conjugacy classes of S_n is the partition function p(n) (sequence A000041) and the number of conjugacy classes that have odd number of elements is given in A060632 so a(n) = A000041(n) - A060632(n) for n >= 1`
	CROSSREFS	`A000041, A060632.` `Sequence in context: A161423 A133846 A175235 * A025077 A186773 A130759` `Adjacent sequences: A060640 A060641 A060642 * A060644 A060645 A060646`
	KEYWORD	`nonn`
	AUTHOR	`Avi Peretz (njk(AT)netvision.net.il), Apr 17 2001`

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.