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A144674 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 z. 4
2, 20, 24, 360, 816, 1056, 12240, 15840, 29120, 181632, 287300, 2724480, 93358848, 1400382720 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Factorization of a(11) : 17*5^2*2^2*13^2.
CROSSREFS
Sequence in context: A202170 A136908 A196748 * A144673 A144672 A145681
KEYWORD
nonn,more
AUTHOR
Yasutoshi Kohmoto, Feb 02 2009
STATUS
approved

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Last modified May 20 23:09 EDT 2024. Contains 372720 sequences. (Running on oeis4.)