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A124940 Numbers n such that n and n+3 are 3-almost primes. +0
5
27, 42, 63, 75, 99, 102, 114, 171, 172, 242, 255, 258, 279, 282, 322, 354, 363, 366, 385, 399, 423, 425, 426, 435, 452, 474, 531, 575, 595, 602, 603, 606, 615, 639, 642, 651, 654, 665, 722, 759, 772, 830, 844, 894, 903, 906, 932, 935, 978 (list; graph; listen)
OFFSET

1,1

EXAMPLE

27=3*3*3, 30=2*3*5; 42=2*3*7, 45=3*3*5.

CROSSREFS

Cf. A124941, A124942.

Sequence in context: A097228 A039614 A117103 this_sequence A114446 A141229 A121614

Adjacent sequences: A124937 A124938 A124939 this_sequence A124941 A124942 A124943

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Nov 13 2006

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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.


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