A239764 Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(f(f(x))) = f(g(x)).

1, 1, 10, 183, 5128, 203085, 10709136, 722183371

Offset

0,3

Links

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

Crossrefs

Cf. A181162.

Sequence in context: A171513 A240405 A304936 * A364987 A179521 A211102

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