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

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

Cf. A047994. 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