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A239764 Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(f(f(x))) = f(g(x)). 0
1, 1, 10, 183, 5128, 203085, 10709136, 722183371 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..7.

CROSSREFS

Cf. A181162.

Sequence in context: A171513 A240405 A304936 * A179521 A211102 A121973

Adjacent sequences:  A239761 A239762 A239763 * A239765 A239766 A239767

KEYWORD

nonn,more

AUTHOR

Chad Brewbaker, Mar 26 2014

EXTENSIONS

a(6)-a(7) from Giovanni Resta, Mar 28 2014

STATUS

approved

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Last modified December 7 20:33 EST 2019. Contains 329849 sequences. (Running on oeis4.)