id:A033987 - OEIS Search Results

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Numbers that are divisible by at least 4 primes (counted with multiplicity).

+0
4

16, 24, 32, 36, 40, 48, 54, 56, 60, 64, 72, 80, 81, 84, 88, 90, 96, 100, 104, 108, 112, 120, 126, 128, 132, 135, 136, 140, 144, 150, 152, 156, 160, 162, 168, 176, 180, 184, 189, 192, 196, 198, 200, 204, 208, 210, 216, 220, 224, 225, 228, 232, 234, 240, 243 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Complement of A037144: A001222(a(n))>3; A117358(a(n))>1. - Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Mar 10 2006`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000`
	FORMULA	`Product p_i^e_i with Sum e_i >= 4.`
	CROSSREFS	`Cf. A014613.` `Sequence in context: A052058 A105732 A114415 this_sequence A140349 A088493 A074451` `Adjacent sequences: A033984 A033985 A033986 this_sequence A033988 A033989 A033990`
	KEYWORD	`nonn,easy`
	AUTHOR	`njas`
	EXTENSIONS	`More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 15 1998.`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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