A144651 Consider pairs of numbers m,n such that UnitaryPhi(m)=UnitaryPhi(n)= (3*m^(1/2)-2*n^(1/2))^2, m<n. Sequence gives m.

8954982400, 146700521676800, 273857689763840, 8383654522880000

Offset

1,1

Comments

If m=n then only one example m=n=1 exists.

Links

Table of n, a(n) for n=1..4.

Example

Factorization :
2^12*5^2*7*13*31^2
2^13*5^2*7*13*8191*31^2
2^14*5*7^2*13*43*127*31^2
2^15*5^4*7*13*31*151*31^2

Crossrefs

Cf. A047994, A144648.

Sequence in context: A270612 A331412 A204407 * A345863 A346257 A345723

Adjacent sequences: A144648 A144649 A144650 * A144652 A144653 A144654

Keyword

nonn,more

Author

Yasutoshi Kohmoto, Jan 19 2009

Status

approved