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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
OFFSET
1,1
COMMENTS
There may be no further terms.
EXAMPLE
Factorizations : 2^2*3*17, 2^3*7*3*17, 2^3*13*3*53
CROSSREFS
Cf. A047994. See A099106 for y values.
Sequence in context: A338153 A234796 A234789 * A253680 A209790 A348603
KEYWORD
nonn,bref,more
STATUS
approved