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A058074 GCD(d(n),d(n+1)) = 1, where d(n) is number of positive divisors of n. +0
2
1, 3, 4, 8, 9, 15, 16, 24, 25, 35, 36, 48, 63, 64, 81, 100, 120, 121, 143, 144, 168, 169, 195, 196, 225, 255, 256, 289, 323, 361, 399, 400, 440, 441, 483, 484, 528, 529, 576, 625, 676, 728, 729, 783, 784, 840, 841, 899, 900, 960, 961, 1023, 1024, 1088, 1089 (list; graph; listen)
OFFSET

0,2

EXAMPLE

8 is included because d(8) = 4 is relatively prime to d(9) = 3.

CROSSREFS

Adjacent sequences: A058071 A058072 A058073 this_sequence A058075 A058076 A058077

Sequence in context: A047204 A050035 A046974 this_sequence A123722 A096185 A137640

KEYWORD

nonn

AUTHOR

Leroy Quet (qq-quet(AT)mindspring.com), Nov 11 2000

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Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.


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