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A175718 a(1) = 1, for n >= 2, a(n) = the smallest number m with (a(n-1) + 2) divisors. 2
1, 4, 12, 192, 237684487542793012780631851008 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..5.

FORMULA

A000005(a(n)) = a(n-1) + 2 for n >= 2.

EXAMPLE

a(4) = 192 = the smallest number with 12 + 2 = 14 divisors.

CROSSREFS

Cf. A014221, A175719, A175720.

Sequence in context: A222393 A213143 A173603 * A076030 A202859 A131491

Adjacent sequences:  A175715 A175716 A175717 * A175719 A175720 A175721

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Aug 15 2010

STATUS

approved

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Last modified August 5 01:51 EDT 2021. Contains 346456 sequences. (Running on oeis4.)