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URL: https://oeis.org/A212666

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A212666
Numbers such that the greatest prime divisor is less than the product of the other distinct prime divisors.
2
30, 60, 70, 90, 105, 120, 140, 150, 154, 165, 180, 182, 195, 210, 231, 240, 270, 273, 280, 286, 300, 308, 315, 330, 350, 357, 360, 364, 374, 385, 390, 399, 418, 420, 429, 442, 450, 455, 462, 480, 490, 494, 495, 510, 525, 540, 546, 560, 561, 570, 572, 585, 595
OFFSET
1,1
LINKS
EXAMPLE
30 is in the sequence because 30 = 2*3*5 and 5 < 2 * 3 = 6.
MAPLE
with(numtheory):for n from 2 to 600 do:x:=factorset(n):m:=nops(x): p:=product( '
x[i] ', 'i'=1..m): q:=p/x[m]:if x[m] < q then printf(`%d, `, n):else fi:od:
CROSSREFS
Sequence in context: A267967 A051283 A066031 * A291046 A221054 A071140
KEYWORD
nonn
AUTHOR
Michel Lagneau, May 23 2012
STATUS
approved