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A175718 a(1) = 1, for n >= 2, a(n) = the smallest number m with (a(n-1) + 2) divisors. 2

%I

%S 1,4,12,192,237684487542793012780631851008

%N a(1) = 1, for n >= 2, a(n) = the smallest number m with (a(n-1) + 2) divisors.

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

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

%Y Cf. A014221, A175719, A175720.

%K nonn

%O 1,2

%A _Jaroslav Krizek_, Aug 15 2010

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Last modified September 25 07:27 EDT 2021. Contains 347654 sequences. (Running on oeis4.)