A097374 - OEIS

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A097374

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'.

1, 4, 16, 27, 356, 3125, 46656 (list; graph; refs; listen; history; internal format)

	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 * A046361 A017569 A161335` `Adjacent sequences: A097371 A097372 A097373 * A097375 A097376 A097377`
	KEYWORD	`nonn`
	AUTHOR	`Ashutosh (ashu(AT)iitk.ac.in), Sep 18 2004`

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Last modified February 17 18:01 EST 2012. Contains 206061 sequences.