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A046309 Numbers that are divisible by at least 8 primes (counted with multiplicity). 4

%I #11 Oct 10 2019 22:55:18

%S 256,384,512,576,640,768,864,896,960,1024,1152,1280,1296,1344,1408,

%T 1440,1536,1600,1664,1728,1792,1920,1944,2016,2048,2112,2160,2176,

%U 2240,2304,2400,2432,2496,2560,2592,2688,2816,2880,2916,2944,3024,3072,3136

%N Numbers that are divisible by at least 8 primes (counted with multiplicity).

%H Harvey P. Dale, <a href="/A046309/b046309.txt">Table of n, a(n) for n = 1..1000</a>

%F Product p_i^e_i with Sum e_i >= 8.

%t Select[Range[3200],PrimeOmega[#]>7&] (* _Harvey P. Dale_, May 29 2013 *)

%o (PARI) is(n)=bigomega(n)>7 \\ _Charles R Greathouse IV_, Sep 17 2015

%Y Cf. A046310.

%K nonn

%O 1,1

%A _Patrick De Geest_, Jun 15 1998

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)