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A046307 Numbers that are divisible by at least 7 primes (counted with multiplicity). 3
128, 192, 256, 288, 320, 384, 432, 448, 480, 512, 576, 640, 648, 672, 704, 720, 768, 800, 832, 864, 896, 960, 972, 1008, 1024, 1056, 1080, 1088, 1120, 1152, 1200, 1216, 1248, 1280, 1296, 1344, 1408, 1440, 1458, 1472, 1512, 1536, 1568, 1584, 1600, 1620 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

FORMULA

Product p_i^e_i with Sum e_i >= 7.

MATHEMATICA

Select[Range[2000], PrimeOmega[#]>6&] (* Harvey P. Dale, Nov 16 2012 *)

PROG

(PARI) is(n)=bigomega(n)>6 \\ Charles R Greathouse IV, Sep 17 2015

CROSSREFS

Cf. A046308.

Sequence in context: A109651 A114408 A114418 * A036331 A046308 A110290

Adjacent sequences:  A046304 A046305 A046306 * A046308 A046309 A046310

KEYWORD

nonn,changed

AUTHOR

Patrick De Geest, Jun 15 1998

STATUS

approved

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Last modified October 14 05:08 EDT 2019. Contains 327995 sequences. (Running on oeis4.)