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A133813 Numbers that are primally tight and have strictly descending powers. +0
7
1, 2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 16, 17, 19, 23, 24, 25, 27, 29, 31, 32, 37, 41, 43, 45, 47, 48, 49, 53, 59, 61, 64, 67, 71, 72, 73, 79, 81, 83, 89, 96, 97, 101, 103, 107, 109, 113, 121, 125, 127, 128, 131, 135, 137, 139, 144, 149, 151, 157, 163, 167, 169, 173, 175 (list; graph; listen)
OFFSET

1,2

COMMENT

All numbers of the form p_1^k1*p_2^k2*...*p_n^k_n, where k1 > k2 > ... > k_n, and the p_i are n successive primes.

Subset of A073491, A133812.

Differs from A085233 starting n=22.

CROSSREFS

Cf. A025487, A087980, A073491, A133808-A133812.

Sequence in context: A119848 A048683 A085233 this_sequence A079734 A050730 A141819

Adjacent sequences: A133810 A133811 A133812 this_sequence A133814 A133815 A133816

KEYWORD

nonn

AUTHOR

Olivier Gerard (olivier.gerard(AT)gmail.com), Sep 23, 2007

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Last modified December 4 21:35 EST 2008. Contains 151309 sequences.


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