id:A141698 - OEIS Search Results

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Arrange the distinct prime divisors of each non-prime-power positive integer n in order from smallest to largest. n is included in sequence A141698 if the differences between consecutive primes in the arrangement of primes are all powers of 2 (including possibly 1).

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6, 12, 15, 18, 21, 24, 30, 33, 35, 36, 42, 45, 48 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`84 has the prime factorization 2^2 3^1 7^1. So the distinct primes dividing 84 are 2,3, and 7. 3-2=1, a power of 2. And 7-3 = 4, also a power of 2. So 84 is included in this sequence.`
	CROSSREFS	`Cf. A024619, A000079.` `Sequence in context: A005279 A129512 A116359 this_sequence A091011 A104210 A066312` `Adjacent sequences: A141695 A141696 A141697 this_sequence A141699 A141700 A141701`
	KEYWORD	`more,nonn`
	AUTHOR	`Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Jun 30 2008`

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.

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