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A067290 Numbers n such that prime(n)<n*tau(n) where tau(n) is the number of divisors of n. +0
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2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 26, 27, 28, 30, 32, 36, 40, 42, 44, 45, 48, 50, 52, 54, 56, 60, 63, 64, 66, 68, 70, 72, 75, 76, 78, 80, 84, 88, 90, 92, 96, 98, 99, 100, 102, 104, 105, 108, 110, 112, 114, 116, 117, 120, 124, 126, 128, 130, 132 (list; graph; listen)
OFFSET

1,1

PROGRAM

(PARI) : for(n=1, 171, if(prime(n)<n*numdiv(n), print1(n, ", ")))

CROSSREFS

Cf. A000005.

Sequence in context: A063450 A047229 A094229 this_sequence A106577 A068577 A035033

Adjacent sequences: A067287 A067288 A067289 this_sequence A067291 A067292 A067293

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 24 2002

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.


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