Search: id:A069277
Results 1-1 of 1 results found.

%I A069277
%S A069277 65536,98304,147456,163840,221184,229376,245760,331776,344064,360448,
%T A069277 368640,409600,425984,497664,516096,540672,552960,557056,573440,614400,
%U A069277 622592,638976,746496,753664,774144,802816,811008,829440,835584,860160
%N A069277 16-almost primes (generalization of semiprimes).
%C A069277 Divisible by exactly 16 primes (counted with multiplicity).
%C A069277 Any 16-almost prime can be represented in several ways as a product of 
               two 8-almost primes A046310; in several ways as a product of four 
               4-almost primes A014613; and in several ways as a product of eight 
               semiprimes A001358. - Jonathan Vos Post (jvospost3(AT)gmail.com), 
               Dec 12 2004
%H A069277 D. W. Wilson, <a href="b069277.txt">Table of n, a(n) for n = 1..10000</
               a>
%H A069277 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               AlmostPrime.html">Link to a section of The World of Mathematics.</
               a>
%F A069277 Product p_i^e_i with Sum e_i = 16.
%t A069277 Select[Range[300000], Plus @@ Last /@ FactorInteger[ # ] == 16 &] - Vladimir 
               Orlovsky, Apr 23 2008
%o A069277 (PARI) k=16; start=2^k; finish=1000000; v=[] for(n=start,finish, if(bigomega(n)==k,
               v=concat(v,n))); v
%Y A069277 Cf. A001358 (semiprimes), A069276 (15-almost primes), A069278 (17-almost 
               primes) - A069281 (20-almost primes).
%Y A069277 Cf. A014610, A014613, A001358, A101637, A101638, A101605, A101606.
%Y A069277 Sequence in context: A011566 A022532 A069391 this_sequence A016784 A016808 
               A016904
%Y A069277 Adjacent sequences: A069274 A069275 A069276 this_sequence A069278 A069279 
               A069280
%K A069277 nonn
%O A069277 1,1
%A A069277 Rick L. Shepherd (rshepherd2(AT)hotmail.com), Mar 13 2002

Search completed in 0.001 seconds