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A235326 Number of ordered pairs of endofunctions f,g on a set of n elements satisfying f(f(f(x))) = g(g(g(x))). 0
1, 1, 4, 51, 1504, 66525, 4196856, 359031967, 39705044464, 5476674540825 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

CROSSREFS

Cf. A000248, A000949.

Sequence in context: A293075 A300732 A220282 * A210834 A287231 A289708

Adjacent sequences: A235323 A235324 A235325 * A235327 A235328 A235329

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 March 23 03:40 EDT 2023. Contains 361434 sequences. (Running on oeis4.)