A235325 - OEIS

A235325

Number of ordered pairs of endofunctions f,g on a set of n elements satisfying f(f(x)) = g(g(g(x))).

1, 1, 4, 51, 1072, 31845, 1292616, 68464207, 4555593904, 369790197705 (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: A343572 A336608 A349653 * A230401 A293075 A300732` `Adjacent sequences: A235322 A235323 A235324 * A235326 A235327 A235328`
	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`

Last modified March 22 13:50 EDT 2023. Contains 361430 sequences. (Running on oeis4.)