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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: A234509 A177751 A338176 * A349556 A364982 A376123
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 October 28 08:06 EDT 2024. Contains 377146 sequences.
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