|
|
A179664
|
|
Products of the 7th power of a prime and a distinct prime (p^7*q).
|
|
12
|
|
|
384, 640, 896, 1408, 1664, 2176, 2432, 2944, 3712, 3968, 4374, 4736, 5248, 5504, 6016, 6784, 7552, 7808, 8576, 9088, 9344, 10112, 10624, 10935, 11392, 12416, 12928, 13184, 13696, 13952, 14464, 15309, 16256, 16768, 17536, 17792, 19072, 19328
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
MATHEMATICA
|
f[n_]:=Sort[Last/@FactorInteger[n]]=={1, 7}; Select[Table[n, {n, 8!}], f[ # ]&]
|
|
PROG
|
(PARI) list(lim)=my(v=List(), t); forprime(p=2, (lim\2)^(1/7), t=p^7; forprime(q=2, lim\t, if(p==q, next); listput(v, t*q))); vecsort(Vec(v)) \\ Charles R Greathouse IV, Jul 20 2011
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,changed
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|