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A239782
Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(g(f(x))) = f(f(g(x))).
0
1, 1, 14, 321, 12256, 682985, 52551216, 5333977789
OFFSET
0,3
CROSSREFS
Cf. A181162.
Sequence in context: A303488 A341501 A255857 * A294040 A035018 A264177
KEYWORD
nonn,more
AUTHOR
Chad Brewbaker, Mar 26 2014
EXTENSIONS
a(6)-a(7) from Giovanni Resta, Mar 28 2014
STATUS
approved