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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. 1
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 : 2^2*3*17, 2^3*7*3*17, 2^3*13*3*53

CROSSREFS

See A099106 for y values.

Sequence in context: A292346 A234796 A234789 * A253680 A209790 A194192

Adjacent sequences:  A099102 A099103 A099104 * A099106 A099107 A099108

KEYWORD

nonn,bref,more

AUTHOR

Yasutoshi Kohmoto

STATUS

approved

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Last modified March 26 14:48 EDT 2019. Contains 321497 sequences. (Running on oeis4.)