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A235327 Number of ordered pairs of endofunctions f, g on a set of n elements satisfying f(f(x)) = g(g(x)). 0
1, 1, 6, 69, 1144, 25045, 708336, 24564211, 1020980640, 49909891257 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..9.

CROSSREFS

Cf. A000949, A060905.

Sequence in context: A214694 A234509 A177751 * A098639 A305110 A235328

Adjacent sequences:  A235324 A235325 A235326 * A235328 A235329 A235330

KEYWORD

nonn,more

AUTHOR

Chad Brewbaker, Mar 26 2014

EXTENSIONS

a(6)-a(7) from Giovanni Resta, Mar 26 2014

a(8)-a(9) from Giovanni Resta, Mar 28 2014

STATUS

approved

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Last modified August 11 05:33 EDT 2020. Contains 336422 sequences. (Running on oeis4.)