id:A097374 - OEIS Search Results

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Perfect 4-composites: a perfect 4-composite is a natural number that can be represented in the form a^(a^(a^........(a^(a) ) ) ) for some natural number 'a'.

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1, 4, 16, 27, 356, 3125, 46656 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(3) = 16 since 16 = 2^(2^(2)) and only two perfect 4-powers lie below it.`
	CROSSREFS	`Sequence in context: A067688 A046358 A046366 this_sequence A046361 A017569 A161335` `Adjacent sequences: A097371 A097372 A097373 this_sequence A097375 A097376 A097377`
	KEYWORD	`nonn`
	AUTHOR	`Ashutosh (ashu(AT)iitk.ac.in), Sep 18 2004`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

AT&T Labs Research