A144648 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 n.

10147737600, 166240237363200, 310334052188160, 9500311941120000

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*3^2*11^2
2^13*5^2*7*13*8191*3^2*11^2
2^14*5*7^2*13*43*127*3^2*11^2
2^15*5^4*7*13*31*151*3^2*11^2

Crossrefs

Cf. A047994, A144651.

Sequence in context: A173051 A159569 A159292 * A098143 A276590 A259152

Adjacent sequences: A144645 A144646 A144647 * A144649 A144650 A144651

Keyword

nonn,more

Author

Yasutoshi Kohmoto, Jan 19 2009

Status

approved