A144673 Numbers x,y,z such that UnitarySigma(x) = UnitarySigma(y) = UnitarySigma(z) = 3*(x*y*z)^(1/2)/(- x^(1/2) + 8*y^(1/2) - 5*z^(1/2)), z<=y<=x; sequence gives y.

2, 20, 24, 360, 816, 1056, 12240, 15840, 29120, 181632, 333200, 2724480, 93358848, 1400382720

Offset

1,1

Links

Table of n, a(n) for n=1..14.

Example

Factorization of a(11) : 17*5^2*2^4*7^2.

Crossrefs

Cf. A034448, A144672, A144674.

Sequence in context: A136908 A196748 A144674 * A144672 A145681 A108061

Adjacent sequences: A144670 A144671 A144672 * A144674 A144675 A144676

Keyword

nonn,more

Author

Yasutoshi Kohmoto, Feb 02 2009

Status

approved