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Search: id:A141699
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| A141699 |
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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 A141699 if the differences between consecutive primes in the arrangement of primes are all non-prime-powers. |
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OFFSET
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1,1
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EXAMPLE
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1564 has the prime factorization 2^2 *17^1 *23^1. So the distinct primes dividing 1564 are 2, 17, and 23. 17-2 = 15, which is not a power of a prime. 23 -17 = 6, which is also not a power of a prime. So 1564 is included in this sequence.
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CROSSREFS
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Cf. A024619.
Sequence in context: A031172 A045561 A067190 this_sequence A045044 A108303 A062695
Adjacent sequences: A141696 A141697 A141698 this_sequence A141700 A141701 A141702
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KEYWORD
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more,nonn
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AUTHOR
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Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Jun 30 2008
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