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A060643 Number of conjugacy classes in the symmetric group S_n that have even number of elements. 0
0, 0, 1, 3, 5, 7, 11, 20, 28, 38, 52, 73, 97 (list; graph; refs; listen; history; text; 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

LINKS

Table of n, a(n) for n=1..13.

CROSSREFS

A000041, A060632.

Sequence in context: A323065 A225421 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

STATUS

approved

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Last modified August 9 21:21 EDT 2020. Contains 336326 sequences. (Running on oeis4.)