|
| |
|
|
A190319
|
|
Numbers with prime factorization pq^2r^2s^4.
|
|
3
|
|
|
|
25200, 35280, 39600, 46800, 56700, 58800, 61200, 68400, 77616, 79380, 82800, 87120, 89100, 91728, 104400, 105300, 111600, 119952, 121680, 121968, 133200, 134064, 137700, 145200, 147600, 153900, 154800, 157500, 162288, 169200, 170352
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
LINKS
|
T. D. Noe, Table of n, a(n) for n = 1..1000
Will Nicholes,Prime Signatures
|
|
|
MATHEMATICA
|
f[n_]:=Sort[Last/@FactorInteger[n]]=={1, 2, 2, 4}; Select[Range[250000], f]
|
|
|
CROSSREFS
|
Cf. A190293, A190294.
Sequence in context: A125268 A212726 A205041 * A076583 A226501 A046709
Adjacent sequences: A190316 A190317 A190318 * A190320 A190321 A190322
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Vladimir Joseph Stephan Orlovsky, May 08 2011
|
|
|
STATUS
|
approved
|
| |
|
|
