

A176167


First of a triple of consecutive integers, each the product of 4 distinct primes.


5



203433, 214489, 225069, 258013, 294593, 313053, 315721, 352885, 389389, 409353, 418845, 421629, 452353, 464385, 478905, 485133, 500905, 508045, 508989, 526029, 528409, 538745, 542269, 542793, 548301, 556869, 559689, 569065, 571233, 579885
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS

FactorInteger[203433]=3*19*43*83,...
A subsequence of A242607 and A016813.  M. F. Hasler, May 19 2014


LINKS

Zak Seidov, Table of n,a(n) for n=1..1000


MATHEMATICA

f1[n_]:=Last/@FactorInteger[n]=={1, 1, 1, 1}; f2[n_]:=Max[Last/@FactorInteger[n]]; lst={}; Do[If[f1[n]&&f1[n+1]&&f1[n+2], AppendTo[lst, n]], {n, 5*8!, 7*9!}]; lst


PROG

(PARI) forstep(n=1+10^5, 10^7, 4, for(k=n, n+2, issquarefree(k)next(2)); for(k=n, n+2, omega(k)==4next(2)); print1((n)", ")) \\ M. F. Hasler, May 19 2014


CROSSREFS

Cf. A039833, A066509, A192203.
Sequence in context: A186532 A184455 A210017 * A248203 A235854 A203911
Adjacent sequences: A176164 A176165 A176166 * A176168 A176169 A176170


KEYWORD

nonn


AUTHOR

Vladimir Joseph Stephan Orlovsky, Apr 10 2010


STATUS

approved



