A099105 - OEIS

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A099105

If n = Product p_i^r_i let Uphi(n) = Product(p_i^r_i - 1). Call (x,y) a square unitary phi amicable pair if Uphi(x)^2 = Uphi(y)^2 = x^2-y^2. Sequence gives x values for square unitary phi amicable pairs.

204, 2856, 16536 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`There may be no further terms.`
	LINKS	`Table of n, a(n) for n=1..3.`
	EXAMPLE	`Factorizations : 2^2317, 2^37317, 2^313353`
	CROSSREFS	`See A099106 for y values.` `Sequence in context: A338153 A234796 A234789 * A253680 A209790 A348603` `Adjacent sequences: A099102 A099103 A099104 * A099106 A099107 A099108`
	KEYWORD	`nonn,bref,more`
	AUTHOR	`Yasutoshi Kohmoto`
	STATUS	`approved`

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Last modified August 19 04:00 EDT 2022. Contains 356216 sequences. (Running on oeis4.)