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A087673 a(n) is smallest number m such that (m = product of n primes, not necessarily distinct ones) and all divisors of m are lucky numbers. 0
3, 9, 63, 61383 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..4.

EXAMPLE

E.g. a(2) = 3*3 = 9: divisors of 9 are 1, 3, 9, all of which are lucky numbers.

CROSSREFS

Cf. A057600, A000959.

Sequence in context: A144525 A276535 A228776 * A046239 A093351 A018543

Adjacent sequences:  A087670 A087671 A087672 * A087674 A087675 A087676

KEYWORD

nonn

AUTHOR

Vit Planocka (planocka(AT)mistral.cz), Sep 26 2003

STATUS

approved

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Last modified February 25 11:46 EST 2021. Contains 341606 sequences. (Running on oeis4.)