id:A117988 - OEIS Search Results

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Number of functions f:[n]->[n] such that f[(x^2) mod n]=[f(x)^2] mod n for all x in [n], for n=1,2,3,... Here [n] denotes {0,1,2,...,n-1}.

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1, 4, 6, 16, 18, 576, 78, 1728 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`See A117986 and A117987 for results on other modular functional equations.`
	CROSSREFS	`Cf. A117986, A119787.` `Sequence in context: A056222 A138624 A071428 this_sequence A120542 A132344 A097970` `Adjacent sequences: A117985 A117986 A117987 this_sequence A117989 A117990 A117991`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Apr 14 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.