id:A102467 - OEIS Search Results

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Numbers such that the sum of numbers of prime factors with and without repetitions does not equal the number of divisors.

+0
4

1, 12, 18, 20, 24, 28, 30, 36, 40, 42, 44, 45, 48, 50, 52, 54, 56, 60, 63, 66, 68, 70, 72, 75, 76, 78, 80, 84, 88, 90, 92, 96, 98, 99, 100, 102, 104, 105, 108, 110, 112, 114, 116, 117, 120, 124, 126, 130, 132, 135, 136, 138, 140, 144, 147, 148, 150, 152, 153, 154, 156 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Complement of A102466; A000005(a(n)) <> A001221(a(n)) + A001222(a(n)).`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000`
	FORMULA	`These are the numbers which are neither prime powers (>1) nor semiprimes. - M. F. Hasler, Jan 31 2008`
	CROSSREFS	`Cf. A135767.` `Sequence in context: A091196 A007624 A036456 this_sequence A126706 A123711 A059404` `Adjacent sequences: A102464 A102465 A102466 this_sequence A102468 A102469 A102470`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 09 2005`

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Last modified November 23 10:40 EST 2009. Contains 167421 sequences.

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