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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)==4||next(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

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Last modified December 15 22:02 EST 2019. Contains 330012 sequences. (Running on oeis4.)