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A171783
Third smallest divisor of smallest number having exactly n divisors.
3
4, 3, 4, 3, 4, 3, 3, 3, 4, 3, 4, 3, 3, 3, 4, 3, 4, 3, 3, 3, 4, 3, 3, 3, 3, 3, 4, 3, 4, 3, 3, 3, 3, 3, 4, 3, 3, 3, 4, 3, 4, 3, 3, 3, 4, 3, 3, 3, 3, 3, 4, 3, 3, 3, 3, 3, 4, 3, 4, 3, 3, 3, 3, 3, 4, 3, 3, 3, 4, 3, 4, 3, 3, 3, 3, 3, 4, 3, 3, 3, 4, 3, 3, 3, 3, 3, 4, 3, 3, 3, 3, 3, 3, 3, 4, 3, 3, 3, 4, 3, 4, 3, 3, 3, 4
OFFSET
3,1
COMMENTS
Conjecture: a(n) = 4 for all prime numbers >= 3 and 3 for all composites
Third column of triangle in A081532. - N. J. A. Sloane, Oct 12 2010.
LINKS
Antti Karttunen, Table of n, a(n) for n = 3..2000 (computed from the b-file of A005179 provided by Don Reble)
FORMULA
a(n) = A292269(A005179(n)) for n >= 3. - Antti Karttunen, Oct 04 2017
EXAMPLE
a(4) = 3 because the divisors of 6 are 1, 2, 3, 6.
CROSSREFS
Cf. A081532, A171784. - N. J. A. Sloane, Oct 12 2010.
Sequence in context: A108171 A231475 A106055 * A251767 A168309 A103947
KEYWORD
nonn
AUTHOR
J. Lowell, Oct 12 2010
EXTENSIONS
More terms from R. J. Mathar, Oct 13 2010
STATUS
approved