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 A168352 Products of 6 distinct odd primes. 3
 255255, 285285, 345345, 373065, 435435, 440895, 451605, 465465, 504735, 533715, 555555, 569415, 596505, 608685, 615615, 636405, 645645, 672945, 680295, 692835, 705705, 719355, 726495, 752115, 770385, 780045, 795795, 803985, 805035, 811965, 823515, 838695, 844305, 858585 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS David A. Corneth, Table of n, a(n) for n = 1..10000 FORMULA A067885 INTERSECT A005408. [R. J. Mathar, Nov 24 2009] EXAMPLE 255255 = 3*5*7*11*13*17 285285 = 3*5*7*11*13*19 345345 = 3*5*7*11*13*23 435435 = 3*5*7*11*13*29 MATHEMATICA f[n_]:=Last/@FactorInteger[n]=={1, 1, 1, 1, 1, 1}&&FactorInteger[n][[1, 1]]>2; lst={}; Do[If[f[n], AppendTo[lst, n]], {n, 6*9!}]; lst PROG (PARI) is(n) = {n%2 == 1 && factor(n)[, 2]~ == [1, 1, 1, 1, 1, 1]} \\ David A. Corneth, Aug 26 2020 (Python) from sympy import primefactors, factorint print([n for n in range(1, 1000000, 2) if len(primefactors(n)) == 6 and max(list(factorint(n).values())) == 1]) # Karl-Heinz Hofmann, Mar 01 2023 CROSSREFS Cf. A005408, A067885. Cf. A046391 (5 distinct odd primes). Sequence in context: A140079 A321505 A034631 * A147579 A087025 A249915 Adjacent sequences: A168349 A168350 A168351 * A168353 A168354 A168355 KEYWORD nonn,easy AUTHOR Vladimir Joseph Stephan Orlovsky, Nov 23 2009 EXTENSIONS Definition corrected by R. J. Mathar, Nov 24 2009 More terms from David A. Corneth, Aug 26 2020 STATUS approved

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Last modified December 7 04:15 EST 2023. Contains 367629 sequences. (Running on oeis4.)