id:A014614 - OEIS Search Results

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Numbers that are products of 5 primes (or 5-almost primes, a generalization of semiprimes).

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32, 48, 72, 80, 108, 112, 120, 162, 168, 176, 180, 200, 208, 243, 252, 264, 270, 272, 280, 300, 304, 312, 368, 378, 392, 396, 405, 408, 420, 440, 450, 456, 464, 468, 496, 500, 520, 552, 567, 588, 592, 594, 612, 616, 630, 656, 660, 675, 680, 684, 688, 696 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Divisible by exactly 5 primes (counted with multiplicity).`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..10000` `Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.`
	FORMULA	`Product p_i^e_i with Sum e_i = 5.`
	MATHEMATICA	`Select[Range[300], Plus @@ Last /@ FactorInteger[ # ] == 5 &] - Vladimir Orlovsky, Apr 23 2008`
	CROSSREFS	`Cf. A014613, A046304, A114453 (number of 5-almost primes <= 10^n).` `Sequence in context: A090052 A163285 A036329 this_sequence A046371 A039379 A043202` `Adjacent sequences: A014611 A014612 A014613 this_sequence A014615 A014616 A014617`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com)`
	EXTENSIONS	`More terms from Scott Lindhurst (ScottL(AT)alumni.princeton.edu) and Patrick De Geest, Jun 15 1998 (pdg(AT)worldofnumbers.com).`

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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.

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